Common Weakness Enumeration

CWE-601

Allowed

URL Redirection to Untrusted Site ('Open Redirect')

Abstraction: Base · Status: Draft

The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

2424 vulnerabilities reference this CWE, most recent first.

CVE-2026-78145 (GCVE-0-2026-78145)

Vulnerability from cvelistv5 – Published: 2026-08-23 22:45 – Updated: 2026-08-24 18:12 X_Open Source

Title

CTFd __init__.py _is_safe_url redirect

Summary

A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

4.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 18:12 UTC

CWE

CWE-601 - Open Redirect

Assigner

VulDB mitre root

References

9 references

URL	Tags
https://vuldb.com/vuln/394533	vdb-entrytechnical-description
https://vuldb.com/vuln/394533/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-78145	third-party-advisory
https://vuldb.com/submit/882469	third-party-advisory
https://mblunt.dev/writeups/ctfd-open-redirect/	exploit
https://github.com/CTFd/CTFd/pull/3026	issue-trackingpatch
https://github.com/CTFd/CTFd/commit/5d8515842fd1a…	patch
https://github.com/CTFd/CTFd/releases/tag/3.8.4	patch
https://github.com/CTFd/CTFd/	product

Impacted products

1 product

Vendor	Product	Version
n/a	CTFd	Affected: 3.8.0 Affected: 3.8.1 Affected: 3.8.2 Affected: 3.8.3 Affected: 3.8.4 cpe:2.3:a:ctfd:ctfd::::::::

Credits

mblunt (VulDB User)

Show details on NVD website

JSON

To clipboard

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CVE-2026-77028 (GCVE-0-2026-77028)

Vulnerability from cvelistv5 – Published: 2026-08-21 12:13 – Updated: 2026-08-21 19:17

Title

Joomla Extension - yootheme.com - Reflected XSS and open redirect via the submission redirect parameter in Zoo < 4.1.66

Summary

Joomla Extension - yootheme.com - Reflected XSS and open redirect via the submission redirect parameter in Zoo < 4.1.66

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 15:53 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

Joomla mitre root

References

1 reference

URL	Tags
https://www.yootheme.com/	product

Impacted products

1 product

Vendor	Product	Version
yootheme.com	Zoo extension for Joomla	Affected: 1.0.0-4.1.65

Credits

Phil Taylor, mysites.guru

Show details on NVD website

JSON

To clipboard

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CVE-2026-75833 (GCVE-0-2026-75833)

Vulnerability from cvelistv5 – Published: 2026-08-18 11:19 – Updated: 2026-08-18 13:42

Title

Grav API Plugin Open Redirect via Backslash Bypass

Summary

The Grav API plugin (getgrav/grav-plugin-api, bundled with Grav 2.0's admin-next/API stack) before version 1.0.14 contains an open redirect weakness in SsoController::sanitizeReturnTo(). The function rejects a literal '//' prefix but does not account for browsers normalizing backslashes to slashes in special (http/https) schemes, so a returnTo value such as '/\evil.com' passes the guard and is later resolved by the browser as the protocol-relative URL '//evil.com'. Following a legitimate OAuth login flow, an attacker-supplied returnTo parameter could redirect an authenticated victim to an attacker-controlled site for post-login phishing. Full browser-side exploitability depends on the admin-next SPA's client-side oauth-callback handler and was not independently verified by the reporter.

Severity

8.6 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

4.2 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 13:41 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
https://github.com/getgrav/grav/security/advisori…	vendor-advisory
https://www.vulncheck.com/advisories/grav-api-plu…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
getgrav	grav	Affected: 0 , < 1.0.14 (semver) Unaffected: 1.0.14 (semver) cpe:2.3:a:getgrav:grav::::::::

Date Public

2026-08-03 00:00

Credits

iaohkut-from-NightWolf-Team

Show details on NVD website

JSON

To clipboard

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CVE-2026-75628 (GCVE-0-2026-75628)

Vulnerability from cvelistv5 – Published: 2026-08-20 00:40 – Updated: 2026-08-20 02:25

Title

Punk::OAuth2 versions before 0.03 for Perl allow an attacker-chosen off-site redirect after login because same_origin_path accepts a backslash or tab in the return parameter

Summary

Punk::OAuth2 versions before 0.03 for Perl allow an attacker-chosen off-site redirect after login because same_origin_path accepts a backslash or tab in the return parameter. oauth2_login reads the return parameter from the initiation request, runs same_origin_path over it, and stores the survivor in the session flow record as the post-login redirect target. That check rejects a value that does not begin with a slash, one with a slash as its second byte, and one containing CR or LF. A backslash and a tab pass. The URL Standard treats a backslash as equivalent to a slash for special schemes, so `/\evil.example` parses with the authority `evil.example`. It also strips ASCII tab before parsing, so a tab between two leading slashes leaves `//evil.example`. A crafted link to the application's own login route lands the victim on the attacker's site after a genuine authentication. The redirect carries no authorization code or access token.

Severity

No CVSS data available.

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

CPANSec redhat root

References

6 references

URL	Tags
https://metacpan.org/release/LNATION/Punk-OAuth2-…	release-notes
https://metacpan.org/release/LNATION/Punk-OAuth2-…	technical-description
https://datatracker.ietf.org/doc/html/rfc9700#sec…	technical-description
https://url.spec.whatwg.org/#relative-slash-state	technical-description
https://url.spec.whatwg.org/#concept-basic-url-parser	technical-description
http://www.openwall.com/lists/oss-security/2026/08/20/1

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , < 0.03 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2026-75114 (GCVE-0-2026-75114)

Vulnerability from cvelistv5 – Published: 2026-08-19 13:39 – Updated: 2026-08-21 04:47

Title

Joomla Extension - yootheme.com - Open redirect in CommentController::twitterAuthenticate() in Zoo < 4.1.64

Summary

Joomla Extension - yootheme.com - Open redirect in CommentController::twitterAuthenticate() in Zoo < 4.1.64 - The referer request parameter is passed straight to setRedirect() with no validation.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 15:34 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

Joomla mitre root

References

1 reference

URL	Tags
https://www.yootheme.com/	product

Impacted products

1 product

Vendor	Product	Version
yootheme.com	Zoo extension for Joomla	Affected: 1.0.0-4.1.63

Credits

Phil Taylor, mysites.guru

Show details on NVD website

JSON

To clipboard

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CVE-2026-73671 (GCVE-0-2026-73671)

Vulnerability from cvelistv5 – Published: 2026-08-13 16:00 – Updated: 2026-08-14 16:52

Title

Saurus CMS Unauthenticated Open Redirect via logout url parameter

Summary

Saurus CMS Community Edition contains an unauthenticated open redirect vulnerability in the logout handling code in classes/port.inc.php, where the url parameter supplied via GET or POST is passed directly to the Location header without domain allowlist, scheme validation, or relative path enforcement. Attackers can craft a malicious logout URL containing an arbitrary external domain or javascript: URI scheme to redirect authenticated users to attacker-controlled phishing pages after session destruction, enabling credential theft and OAuth redirect abuse.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 16:49 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/sauruscms/Saurus-CMS-Community…	product
https://github.com/DevVaibhav07/VULN-POC/blob/mai…	technical-description
https://www.vulncheck.com/advisories/saurus-cms-u…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Saurus	Saurus CMS Community Edition	Affected: 0 , ≤ d886e5b (custom) cpe:2.3:a:saurus:saurus_cms:::::community:::*

Date Public

2026-08-13 00:00

Credits

Vaibhav Kubade

Show details on NVD website

JSON

To clipboard

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CVE-2026-73563 (GCVE-0-2026-73563)

Vulnerability from cvelistv5 – Published: 2026-08-13 17:32 – Updated: 2026-08-13 18:07

Title

Backstage: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass in `@backstage/plugin-auth-backend`

Summary

Backstage is an open framework for building developer portals. Prior to 0.29.2, the experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for auth.experimentalDynamicClientRegistration.allowedRedirectUriPatterns and the auth.experimentalClientIdMetadataDocuments allowedClientIdPatterns and allowedRedirectUriPatterns options. A hostname wildcard can match across URL component boundaries, allowing an attacker-controlled redirect URI with a trusted hostname suffix in its path to pass the allowlist and receive an OAuth authorization code after a victim completes the flow. Patterns without an explicit protocol can match unintended protocols, and redirect URIs containing embedded credentials are accepted after user information is stripped for matching. The features are experimental and disabled by default; only deployments that enable them and configure custom wildcard-hostname or protocol-less patterns are affected. This issue is first fixed in prerelease version 0.29.2.

Severity

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 18:07 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/backstage/backstage/security/a…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
backstage	backstage	Affected: < 0.29.2

Show details on NVD website

JSON

To clipboard

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CVE-2026-71428 (GCVE-0-2026-71428)

Vulnerability from cvelistv5 – Published: 2026-08-20 16:43 – Updated: 2026-08-20 16:43

Title

unstructured: Server-Side Request Forgery in the URL-based partitioning

Summary

The unstructured library provides open-source components for ingesting and pre-processing images and text documents, such as PDFs, HTML, Word docs, and many more. From 0.4.7 until 0.24.0, the url argument of partition, partition_html, and partition_md is fetched without host validation in unstructured/partition/auto.py, unstructured/partition/html/partition.py, and unstructured/partition/md.py. An attacker who controls that URL can make a server-side ingestion service request loopback addresses, internal HTTP services, or cloud metadata endpoints through direct targets, redirects, or DNS rebinding. The response body is returned as Element text, allowing internal response disclosure, and side-effecting GET endpoints may also be triggered. This issue is fixed in version 0.24.0.

Severity

9.3 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/Unstructured-IO/unstructured/s…	x_refsource_CONFIRM
https://github.com/Unstructured-IO/unstructured/p…	x_refsource_MISC
https://github.com/Unstructured-IO/unstructured/c…	x_refsource_MISC
https://github.com/Unstructured-IO/unstructured/r…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Unstructured-IO	unstructured	Affected: >= 0.4.7, < 0.24.0

Show details on NVD website

JSON

To clipboard

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CVE-2026-71240 (GCVE-0-2026-71240)

Vulnerability from cvelistv5 – Published: 2026-08-05 10:56 – Updated: 2026-08-10 11:45

Title

DjangoCRM - Unauthenticated Open Redirect via toggle_default_sorting next_url Parameter

Summary

DjangoCRM's toggle_default_sorting view is the only route in common/urls.py that is not wrapped in login_required or staff_member_required, and it redirects to a caller-supplied next_url GET parameter after only checking secure_url(next_url), which merely verifies the target host matches the current site's domain (blocking only cross-domain redirects) while allowing any same-site path with no authentication required to reach the view.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-05 12:57 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site

Assigner

TuranSec redhat root

References

1 reference

URL	Tags
https://github.com/DjangoCRM/django-crm	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
DjangoCRM	django-crm	Affected: 0

Date Public

2026-08-05 10:56

Credits

Mirdavlatov Mira'zam

Show details on NVD website

JSON

To clipboard

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CVE-2026-69087 (GCVE-0-2026-69087)

Vulnerability from cvelistv5 – Published: 2026-08-03 13:20 – Updated: 2026-08-03 14:25

Title

Grav Form Plugin before 9.1.13 Open Redirect via form.value() Twig

Summary

The Grav form plugin (getgrav/grav-plugin-form) before 9.1.13 contains an open redirect vulnerability. Since v9.1.11, the redirect process action evaluates user-supplied form data inside Twig expressions, and Grav::redirect() accepts external URLs without origin validation. When a form blueprint defines a redirect target such as redirect: "{{ form.value('next') }}" using an attacker-controllable field, an unauthenticated form submitter can supply a value like https://evil.com to cause a 302 redirect to an arbitrary external site, enabling phishing.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 14:25 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
https://github.com/getgrav/grav/security/advisori…	vendor-advisory
https://www.vulncheck.com/advisories/grav-form-pl…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
getgrav	grav-plugin-form	Affected: 0 , < 9.1.13 (semver) Unaffected: 9.1.13 (semver) cpe:2.3:a:getgrav:grav::::::::

Date Public

2026-07-21 00:00

Credits

nicl4ssic

Show details on NVD website

JSON

To clipboard

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Mitigation MIT-5

Implementation

Strategy: Input Validation

Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Use a list of approved URLs or domains to be used for redirection.

Mitigation

Architecture and Design

Use an intermediate disclaimer page that provides the user with a clear warning that they are leaving the current site. Implement a long timeout before the redirect occurs, or force the user to click on the link. Be careful to avoid XSS problems (CWE-79) when generating the disclaimer page.

Mitigation MIT-21.2

Architecture and Design

Strategy: Enforcement by Conversion

When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
For example, ID 1 could map to "/login.asp" and ID 2 could map to "http://www.example.com/". Features such as the ESAPI AccessReferenceMap [REF-45] provide this capability.

Mitigation

Architecture and Design

Ensure that no externally-supplied requests are honored by requiring that all redirect requests include a unique nonce generated by the application [REF-483]. Be sure that the nonce is not predictable (CWE-330).

Mitigation MIT-6

Architecture and Design Implementation

Strategy: Attack Surface Reduction

Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
Many open redirect problems occur because the programmer assumed that certain inputs could not be modified, such as cookies and hidden form fields.

Mitigation MIT-29

Operation

Strategy: Firewall

Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].

CAPEC-178: Cross-Site Flashing

An attacker is able to trick the victim into executing a Flash document that passes commands or calls to a Flash player browser plugin, allowing the attacker to exploit native Flash functionality in the client browser. This attack pattern occurs where an attacker can provide a crafted link to a Flash document (SWF file) which, when followed, will cause additional malicious instructions to be executed. The attacker does not need to serve or control the Flash document. The attack takes advantage of the fact that Flash files can reference external URLs. If variables that serve as URLs that the Flash application references can be controlled through parameters, then by creating a link that includes values for those parameters, an attacker can cause arbitrary content to be referenced and possibly executed by the targeted Flash application.

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