EUVD-2026-41042
GHSA-c9c4-xmc2-5h6x
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
Low-privilege account required to inject payload; victim must actively view log page; scope changes to victim browser with limited session/content impact.
Primary rating from Vendor (wikimedia-foundation).
CVSS VectorVendor: wikimedia-foundation
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
Lifecycle Timeline
2DescriptionCVE.org
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki.
This vulnerability is associated with program files includes/Language/Language.Php, includes/Logging/BlockLogFormatter.Php, includes/Logging/LogFormatter.Php, includes/Logging/PatrolLogFormatter.Php, includes/Logging/RenameuserLogFormatter.Php, includes/Logging/TagLogFormatter.Php, includes/Specials/SpecialVersion.Php.
This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.
AnalysisAI
Cross-site scripting vulnerabilities across multiple log formatter and language components in MediaWiki allow authenticated low-privilege users to inject malicious JavaScript that executes in the browser of any user who views affected log pages or the SpecialVersion special page. The vulnerability spans seven PHP files covering block, patrol, rename-user, and tag log formatters, the base LogFormatter, the Language class, and SpecialVersion - indicating widespread unsanitized output rendering in administrative and logging interfaces. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid MediaWiki account with at least low-level privileges sufficient to perform actions that are recorded by the affected log formatters (block, patrol, tag, rename-user) or to influence content displayed on Special:Version. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N) presents a notable inconsistency: all confidentiality, integrity, and availability metrics - for both the vulnerable system and subsequent systems - are scored as None, which is atypical for a CWE-79 XSS that exploits a victim's browser session. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a low-privilege MediaWiki account performs an action that generates a log entry processed by one of the affected formatters - for example, triggering a tag change or block action with a crafted payload embedded in a username or reason field. When an administrator later views Special:Log or a related log page, the payload executes in their browser, potentially exfiltrating session cookies or performing privileged wiki actions on their behalf. … |
| Remediation | Upgrade MediaWiki to one of the patched versions: 1.43.9, 1.44.6, 1.45.4, or 1.46.0, selecting the branch that matches the current deployment. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not
(1) boardData102.php, (2) boardData103.php, (3) boardDataJP.php, (4) boardDataNA.php, and (5) boardDataWW.php in Netgear
ProjectSend versions prior to r1720 are affected by an improper authentication vulnerability. Rated critical severity (C
Roundcube Webmail contains a critical PHP object deserialization vulnerability (CVE-2025-49113, CVSS 9.9) that allows au
Util/PHP/eval-stdin.php in PHPUnit before 4.8.28 and 5.x before 5.6.3 allows remote attackers to execute arbitrary PHP c
Palo Alto Networks PAN-OS management web interface contains an authentication bypass allowing unauthenticated attackers
Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re
Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re
The get_referers function in /opt/ws/bin/sblistpack in Sophos Web Appliance before 3.7.9.1 and 3.8 before 3.8.1.1 allows
The Backup Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1
NetAlertX (formerly PiAlert) versions 23.01.14 through 24.x before 24.10.12 allow unauthenticated command injection thro
The GiveWP - Donation Plugin and Fundraising Platform plugin for WordPress is vulnerable to PHP Object Injection in all
Same weakness CWE-79 – Cross-site Scripting (XSS)
View allShare
External POC / Exploit Code
Leaving vuln.today