Common Weakness Enumeration
CWE-117
AllowedImproper Output Neutralization for Logs
Abstraction: Base · Status: Draft
The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.
192 vulnerabilities reference this CWE, most recent first.
CVE-2026-1337 (GCVE-0-2026-1337)
Vulnerability from cvelistv5 – Published: 2026-02-06 13:13 – Updated: 2026-02-06 14:30
VLAI
EPSS
VEX
Title
Insufficient escaping of unicode characters in query log
Summary
Insufficient escaping of unicode characters in query log in Neo4j Enterprise and Community editions prior to 2026.01 can lead to XSS if the user opens the logs in a tool that treats them as HTML. There is no security impact on Neo4j products, but this advisory is released as a precaution to treat the logs as plain text if using versions prior to 2026.01.
Proof of concept exploit: https://github.com/JoakimBulow/CVE-2026-1337
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/JoakimBulow/CVE-2026-1337 | exploit |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| neo4j | Enterprise Edition |
Affected:
0 , < 2026.01.0
(date)
|
|
| neo4j | Community Edition |
Affected:
0 , < 2026.01.0
(date)
|
Credits
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CVE-2025-66577 (GCVE-0-2025-66577)
Vulnerability from cvelistv5 – Published: 2025-12-05 18:20 – Updated: 2025-12-05 18:29
VLAI
EPSS
VEX
Title
cpp-httplib Untrusted HTTP Header Handling: X-Forwarded-For/X-Real-IP Trust
Summary
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which get accepted unconditionally by get_client_ip() in docker/main.cc, causing access and error logs (nginx_access_logger / nginx_error_logger) to record spoofed client IPs (log poisoning / audit evasion). This vulnerability is fixed in 0.27.0.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/yhirose/cpp-httplib/security/a… | x_refsource_CONFIRM |
| https://github.com/yhirose/cpp-httplib/commit/ac9… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| yhirose | cpp-httplib |
Affected:
< 0.27.0
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CVE-2025-59784 (GCVE-0-2025-59784)
Vulnerability from cvelistv5 – Published: 2026-03-04 15:26 – Updated: 2026-03-04 16:16
VLAI
EPSS
VEX
Title
Log Pollution - Control Characters Not Escaped
Summary
2N Access Commander version 3.4.1 and prior is vulnerable to log pollution. Certain parameters sent over API may be included in the logs without prior validation or sanitisation.
This vulnerability can only be exploited after authenticating with administrator privileges.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.2n.com/en-GB/download/cve_2025_59784_… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| 2N Telekomunikace a.s. | 2N Access Commander |
Affected:
0 , < 3.4.2
(Release)
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CVE-2025-58580 (GCVE-0-2025-58580)
Vulnerability from cvelistv5 – Published: 2025-10-06 06:49 – Updated: 2025-10-06 12:21
VLAI
EPSS
VEX
Title
Injection via log file
Summary
An API endpoint allows arbitrary log entries to be created via POST request. Without sufficient validation of the input data, an attacker can create manipulated log entries and thus falsify or dilute logs, for example.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://sick.com/psirt | x_SICK PSIRT Security Advisories |
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| https://www.sick.com/.well-known/csaf/white/2025/… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SICK AG | Enterprise Analytics |
Affected:
all versions
(custom)
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CVE-2025-54813 (GCVE-0-2025-54813)
Vulnerability from cvelistv5 – Published: 2025-08-22 18:45 – Updated: 2025-11-04 21:12
VLAI
EPSS
VEX
Title
Apache Log4cxx: Improper escaping with JSONLayout
Summary
Improper Output Neutralization for Logs vulnerability in Apache Log4cxx.
When using JSONLayout, not all payload bytes are properly escaped. If an attacker-supplied message contains certain non-printable characters, these will be passed along in the message and written out as part of the JSON message. This may prevent applications that consume these logs from correctly interpreting the information within them.
This issue affects Apache Log4cxx: before 1.5.0.
Users are recommended to upgrade to version 1.5.0, which fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Log4cxx |
Affected:
0.11.0 , < 1.5.0
(semver)
|
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CVE-2025-54812 (GCVE-0-2025-54812)
Vulnerability from cvelistv5 – Published: 2025-08-22 18:46 – Updated: 2025-11-04 21:12
VLAI
EPSS
VEX
Title
Apache Log4cxx: Improper HTML escaping in HTMLLayout
Summary
Improper Output Neutralization for Logs vulnerability in Apache Log4cxx.
When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file.
If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user.
In order to activate this, the following sequence must occur:
* Log4cxx is configured to use HTMLLayout.
* Logger name comes from an untrusted string
* Logger with compromised name logs a message
* User opens the generated HTML log file in their browser, leading to potential XSS
Because logger names are generally constant strings, we assess the impact to users as LOW
This issue affects Apache Log4cxx: before 1.5.0.
Users are recommended to upgrade to version 1.5.0, which fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
5 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Log4cxx |
Affected:
0 , < 1.5.0
(semver)
|
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CVE-2025-54656 (GCVE-0-2025-54656)
Vulnerability from cvelistv5 – Published: 2025-07-30 15:58 – Updated: 2025-11-04 21:12 Unsupported When Assigned
VLAI
EPSS
VEX
Title
Apache Struts Extras: Improper Output Neutralization for Logs
Summary
** UNSUPPORTED WHEN ASSIGNED ** Improper Output Neutralization for Logs vulnerability in Apache Struts.
This issue affects Apache Struts Extras: before 2.
When using LookupDispatchAction, in some cases, Struts may print untrusted input to the logs without any filtering. Specially-crafted input may lead to log output where part of the message masquerades as a separate log line, confusing consumers of the logs (either human or automated).
As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.
NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Struts Extras |
Affected:
0 , < 2
(maven)
|
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CVE-2025-54389 (GCVE-0-2025-54389)
Vulnerability from cvelistv5 – Published: 2025-08-14 15:53 – Updated: 2025-11-04 21:12
VLAI
EPSS
VEX
Title
AIDE improper output neutralization vulnerability
Summary
AIDE is an advanced intrusion detection environment. Prior to version 0.19.2, there is an improper output neutralization vulnerability in AIDE. An attacker can craft a malicious filename by including terminal escape sequences to hide the addition or removal of the file from the report and/or tamper with the log output. A local user might exploit this to bypass the AIDE detection of malicious files. Additionally the output of extended attribute key names and symbolic links targets are also not properly neutralized. This issue has been patched in version 0.19.2. A workaround involves configuring AIDE to write the report output to a regular file, redirecting stdout to a regular file, or redirecting the log output written to stderr to a regular file.
Severity
6.2 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/aide/aide/security/advisories/… | x_refsource_CONFIRM |
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CVE-2025-49846 (GCVE-0-2025-49846)
Vulnerability from cvelistv5 – Published: 2025-07-03 16:41 – Updated: 2025-07-03 19:23
VLAI
EPSS
VEX
Title
wire-ios accidentally logs message contents
Summary
wire-ios is an iOS client for the Wire secure messaging application. From Wire iOS 3.111.1 to before 3.124.1, messages that were visible in the view port have been logged to the iOS system logs in clear text. Wire application logs created and managed by the application itself were not affected, especially not the logs users can export and send to Wire support. The iOS logs can only be accessed if someone had (physical) access to the underlying unlocked device. The issue manifested itself by calling canOpenUrl() and passing an invalid URL object. When iOS then performs the check and fails, it logs the contents to the system log. This is not documented behaviour. Wire released an emergency fix with version 3.124.1. As a workaround, users can reset their iOS device to remove the offending logs. Since Wire cannot access or modify iOS system logs, there's no other workaround other than a reset.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wireapp/wire-ios/security/advi… | x_refsource_CONFIRM |
| https://github.com/wireapp/wire-ios/commit/0cff0e… | x_refsource_MISC |
| https://github.com/wireapp/wire-ios/releases/tag/… | x_refsource_MISC |
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CVE-2025-48432 (GCVE-0-2025-48432)
Vulnerability from cvelistv5 – Published: 2025-06-05 00:00 – Updated: 2025-06-11 14:59
VLAI
EPSS
VEX
Summary
An issue was discovered in Django 5.2 before 5.2.3, 5.1 before 5.1.11, and 4.2 before 4.2.23. Internal HTTP response logging does not escape request.path, which allows remote attackers to potentially manipulate log output via crafted URLs. This may lead to log injection or forgery when logs are viewed in terminals or processed by external systems.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
8 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| djangoproject | Django |
Affected:
4.2 , < 4.2.23
(custom)
Affected: 5.1 , < 5.1.11 (custom) Affected: 5.2 , < 5.2.3 (custom) |
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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.
Mitigation MIT-30
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.
Mitigation MIT-20
Implementation
Strategy: Input Validation
Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
CAPEC-268: Audit Log Manipulation
The attacker injects, manipulates, deletes, or forges malicious log entries into the log file, in an attempt to mislead an audit of the log file or cover tracks of an attack. Due to either insufficient access controls of the log files or the logging mechanism, the attacker is able to perform such actions.
CAPEC-81: Web Server Logs Tampering
Web Logs Tampering attacks involve an attacker injecting, deleting or otherwise tampering with the contents of web logs typically for the purposes of masking other malicious behavior. Additionally, writing malicious data to log files may target jobs, filters, reports, and other agents that process the logs in an asynchronous attack pattern. This pattern of attack is similar to "Log Injection-Tampering-Forging" except that in this case, the attack is targeting the logs of the web server and not the application.
CAPEC-93: Log Injection-Tampering-Forging
This attack targets the log files of the target host. The attacker injects, manipulates or forges malicious log entries in the log file, allowing them to mislead a log audit, cover traces of attack, or perform other malicious actions. The target host is not properly controlling log access. As a result tainted data is resulting in the log files leading to a failure in accountability, non-repudiation and incident forensics capability.