Vulnerabilities

Vulnerability in Wikimedia Foundation Scribunto. This issue affects Scribunto: from 1.45.0 before 1.45.2.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Parsoid. This vulnerability is associated with program files includes/parser/Sanitizer.Php, src/Core/Sanitizer.Php. This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Missing Authorization vulnerability in Wikimedia Foundation MediaWiki - CampaignEvents extension allows Privilege Abuse.This issue affects MediaWiki - CampaignEvents extension: 1.45, 1.44, 1.43, 1.39.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Wikibase Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - Wikibase Extension: 1.45, 1.44, 1.43, 1.39.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - UploadWizard extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - UploadWizard extension: 1.45, 1.44, 1.43, 1.39.

CVE-2024-47841 is a path traversal flaw (CWE-22) in the Wikimedia Foundation's CSS extension for MediaWiki, in which pathname input used by the extension's CSS-loading functionality is not properly restricted to the intended directory. An unauthenticated network attacker can supply crafted path components (e.g., ../ sequences) to make the extension reach and load files outside the allowed directory. Per the CVSS 4.0 score of 6.9, the impact is limited: low confidentiality (unintended local file disclosure) and low integrity (unintended content loaded as CSS), with no availability impact and no effect beyond the vulnerable component. Only MediaWiki deployments with the CSS extension installed on the 1.39.x, 1.41.x, or 1.42.x branches at the listed versions are affected. No confirmed in-the-wild exploitation is reported (not in CISA KEV), but a public PoC reference exists (Phabricator T369486) and the 34.6% EPSS score (98th percentile) signals a materially elevated probability of near-term exploitation.

Do: Sites running the CSS extension on MediaWiki 1.39.x, 1.41.x, or 1.42.x should upgrade to 1.39.9, 1.41.3, or 1.42.2 respectively (or later). If patching must be delayed, disable the CSS extension or restrict which users/requests can invoke it, and review access logs for path traversal patterns in CSS-related requests. The public PoC referenced in Phabricator task T369486 can be used to verify the fix.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Apex skin allows Stored XSS.This issue affects Mediawiki - Apex skin: from 1.39.X before 1.39.9, from 1.41.X before 1.41.3, from 1.42.X before 1.42.2.

A vulnerability was found in Wikimedia mediawiki-extensions-I18nTags and classified as problematic. This issue affects some unknown processing of the file I18nTags_body.php of the component Unlike Parser. The manipulation leads to cross site scripting. The attack may be initiated remotely. The identifier of the patch is b4bc3cbbb099eab50cf2b544cf577116f1867b94. It is recommended to apply a patch to fix this issue. The identifier VDB-217445 was assigned to this vulnerability.

Wikimedia Quarry analytics-quarry-web before 2020-12-15 allows Reflected XSS because app.py does not explicitly set the application/json content type.

An issue was discovered in Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2. An attacker can send crafted wikitext that Utils/WTUtils.php will transform by using a tag, bypassing sanitization steps, and potentially allowing for XSS.

In Wikibase Wikidata Query Service GUI before 0.3.6-SNAPSHOT 2019-11-07, when mathematical expressions in results are displayed directly, arbitrary JavaScript execution can occur, aka XSS. This was addressed by introducing MathJax as a new mathematics rendering engine. NOTE: this GUI code is no longer bundled with the Wikibase Wikidata Query Service snapshots, such as 0.3.6-SNAPSHOT.