Common Weakness Enumeration
CWE-80
AllowedImproper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Abstraction: Variant · Status: Incomplete
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.
959 vulnerabilities reference this CWE, most recent first.
CVE-2026-75872 (GCVE-0-2026-75872)
Vulnerability from cvelistv5 – Published: 2026-08-18 14:06 – Updated: 2026-08-18 16:04 X_Open Source
VLAI
EPSS
VEX
Title
HTML Injection in MailerUp double opt-in verification email
Summary
HTML Injection in the public subscription form in maalfer MailerUp before 1.1.3 allows unauthenticated remote attackers to have the application send a message carrying arbitrary HTML, to an attacker-chosen address and from the form owner's configured sending identity, via the first_name field of the subscription request, which is interpolated unescaped into the double opt-in verification email.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 16:04 UTC
CWE
- CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/maalfer/mailerup/commit/da4aed… | patch |
| https://github.com/maalfer/mailerup/releases/tag/v1.1.3 | release-notes |
| https://secur0.com/en/cna/cve-list/cve-2026-75872… | technical-description |
Impacted products
Date Public
2026-08-18 12:43
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CVE-2026-75082 (GCVE-0-2026-75082)
Vulnerability from cvelistv5 – Published: 2026-08-18 00:00 – Updated: 2026-08-18 13:36
VLAI
EPSS
VEX
Title
Webkul Bagisto Customer-Registration Notification Email register cross site scripting
Summary
A flaw has been found in Webkul Bagisto up to 2.4.4. The affected element is an unknown function of the file /customer/register of the component Customer-Registration Notification Email. This manipulation of the argument first_name/last_name causes basic cross site scripting. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor confirms: "The reported issues were already identified through our internal security assessment process prior to this notification and are being handled through our established internal security and development lifecycle. Some of these items have already been addressed, while the remaining items are planned for resolution in upcoming product releases."
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 13:30 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/391310 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/391310/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-75082 | third-party-advisory |
| https://vuldb.com/submit/870360 | third-party-advisory |
| https://github.com/Mitchell45/PHP_Web_POCs/blob/m… | exploit |
Impacted products
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CVE-2026-73238 (GCVE-0-2026-73238)
Vulnerability from cvelistv5 – Published: 2026-08-12 16:41 – Updated: 2026-08-12 18:59
VLAI
EPSS
VEX
Title
Apache Allura: XSS in code display
Summary
XSS vulnerability in code display in Apache Allura.
This issue affects Apache Allura: before 1.19.1.
Users are recommended to upgrade to version 1.19.1, which fixes the issue.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 18:59 UTC
CWE
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Allura |
Affected:
0 , < 1.19.1
(semver)
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CVE-2026-73237 (GCVE-0-2026-73237)
Vulnerability from cvelistv5 – Published: 2026-08-12 16:42 – Updated: 2026-08-12 18:56
VLAI
EPSS
VEX
Title
Apache Allura: XSS in markdown pipeline
Summary
XSS vulnerability in Markdown handling in Apache Allura.
This issue affects Apache Allura: from 1.10.0 before 1.19.1.
Users are recommended to upgrade to version 1.19.1, which fixes the issue.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 18:56 UTC
CWE
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Allura |
Affected:
1.10.0 , < 1.19.1
(semver)
|
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CVE-2026-65841 (GCVE-0-2026-65841)
Vulnerability from cvelistv5 – Published: 2026-07-31 19:16 – Updated: 2026-07-31 20:05
VLAI
EPSS
VEX
Title
Jodit has cross-site scripting (XSS) via <script> nested in SVG that bypasses clean-html sanitization
Summary
Jodit Editor is a WYSIWYG editor with a built-in file browser & image editor. Prior to 4.13.6, Jodit's clean-html denyTags filter does not normalize foreign SVG or MathML script node names, allowing a script element nested directly in SVG or MathML to remain in editor.value and execute when content is loaded. This issue is fixed in version 4.13.6.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 20:05 UTC
CWE
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/xdan/jodit/security/advisories… | x_refsource_CONFIRM |
| https://github.com/xdan/jodit/commit/49a31f451f6b… | x_refsource_MISC |
| https://github.com/xdan/jodit/releases/tag/4.13.6 | x_refsource_MISC |
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CVE-2026-59855 (GCVE-0-2026-59855)
Vulnerability from cvelistv5 – Published: 2026-07-09 22:19 – Updated: 2026-07-14 01:24
VLAI
EPSS
VEX
Title
SiYuan: Store XSS To Rce via Asset.render
Summary
SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, Asset.render in app/src/asset/index.ts interpolates the unsanitized this.path value into HTML assigned to innerHTML, allowing a crafted asset link containing a double quote to break out of the src attribute, inject an event handler, and execute JavaScript that can run OS commands in the Electron renderer. This issue is fixed in versions 3.7.1-alpha.2 and 3.7.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 01:23 UTC
CWE
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | x_refsource_CONFIRM |
| https://github.com/siyuan-note/siyuan/commit/efbe… | x_refsource_MISC |
| https://github.com/siyuan-note/siyuan/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
< 3.7.1
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CVE-2026-59838 (GCVE-0-2026-59838)
Vulnerability from cvelistv5 – Published: 2026-07-15 13:43 – Updated: 2026-07-15 14:23
VLAI
EPSS
VEX
Summary
A improper neutralization of script-related html tags in a web page (basic xss) vulnerability in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.2.0 through 7.2.6, FortiSIEM 7.1 all versions, FortiSIEM 7.0 all versions, FortiSIEM 6.7 all versions, FortiSIEM 6.6 all versions, FortiSIEM 6.5 all versions, FortiSIEM 6.4 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 14:23 UTC
CWE
- CWE-80 - Execute unauthorized code or commands
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Fortinet | FortiSIEM |
Affected:
7.4.0
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CVE-2026-57535 (GCVE-0-2026-57535)
Vulnerability from cvelistv5 – Published: 2026-06-25 14:29 – Updated: 2026-06-25 15:10
VLAI
EPSS
VEX
Summary
Content injected to PDF rendering contexts could, in many places, include HTML content including <img> tags. If the src
attribute of these images pointed to an URL, the PDF rendering engine
would download the image from that place and display it, thereby leaking
information about the rendering server and possibly creating an SSRF
vector in the local network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 15:10 UTC
CWE
- CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
1 reference
Impacted products
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CVE-2026-57534 (GCVE-0-2026-57534)
Vulnerability from cvelistv5 – Published: 2026-06-25 14:11 – Updated: 2026-06-25 15:12
VLAI
EPSS
VEX
Title
Stored XSS in pretix-pages
Summary
Malicious HTML content could be injected into the content of a page in the pretix-pages plugin.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 15:12 UTC
CWE
- CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pretix | pretix-pages |
Affected:
0 , < 1.6.4
(python)
|
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CVE-2026-57533 (GCVE-0-2026-57533)
Vulnerability from cvelistv5 – Published: 2026-06-25 14:31 – Updated: 2026-06-25 15:05
VLAI
EPSS
VEX
Summary
Malicious HTML content could be injected into the page pretix shows when
redirection to an untrusted page occurs. Since this page has a
Content-Security-Policy, this can mainly be used for phishing purposes.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 15:05 UTC
CWE
- CWE-80 - Improper neutralization of Script-Related HTML tags in a web page (basic XSS)
Assigner
References
1 reference
Impacted products
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Mitigation
Implementation
Carefully check each input parameter against a rigorous positive specification (allowlist) defining the specific characters and format allowed. All input should be neutralized, not just parameters that the user is supposed to specify, but all data in the request, including hidden fields, cookies, headers, the URL itself, and so forth. A common mistake that leads to continuing XSS vulnerabilities is to validate only fields that are expected to be redisplayed by the site. We often encounter data from the request that is reflected by the application server or the application that the development team did not anticipate. Also, a field that is not currently reflected may be used by a future developer. Therefore, validating ALL parts of the HTTP request is recommended.
Mitigation MIT-30.1
Implementation
Strategy: Output Encoding
- Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
- The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
Mitigation MIT-43
Implementation
With Struts, write all data from form beans with the bean's filter attribute set to true.
Mitigation MIT-31
Implementation
Strategy: Attack Surface Reduction
To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.
CAPEC-18: XSS Targeting Non-Script Elements
This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an adversary to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote adversary to collect and interpret the output of said attack.
CAPEC-193: PHP Remote File Inclusion
In this pattern the adversary is able to load and execute arbitrary code remotely available from the application. This is usually accomplished through an insecurely configured PHP runtime environment and an improperly sanitized "include" or "require" call, which the user can then control to point to any web-accessible file. This allows adversaries to hijack the targeted application and force it to execute their own instructions.
CAPEC-32: XSS Through HTTP Query Strings
An adversary embeds malicious script code in the parameters of an HTTP query string and convinces a victim to submit the HTTP request that contains the query string to a vulnerable web application. The web application then procedes to use the values parameters without properly validation them first and generates the HTML code that will be executed by the victim's browser.
CAPEC-86: XSS Through HTTP Headers
An adversary exploits web applications that generate web content, such as links in a HTML page, based on unvalidated or improperly validated data submitted by other actors. XSS in HTTP Headers attacks target the HTTP headers which are hidden from most users and may not be validated by web applications.