CVE-2024-23171: mediawiki XSS — Exploit & Fix

Description

An issue was discovered in the CampaignEvents extension in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. The Special:EventDetails page allows XSS via the x-xss language setting for internationalization (i18n).

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
mediawiki	mediawiki	< 1.35.14
mediawiki	mediawiki	1.36.0 — 1.39.6
mediawiki	mediawiki	1.40.0 — 1.40.2

References

Advisories & Patches

https://gerrit.wikimedia.org/r/q/I70d71c409193e904684dfb706d424b0a815fa6f6 https://phabricator.wikimedia.org/T348343 https://gerrit.wikimedia.org/r/q/I70d71c409193e904684dfb706d424b0a815fa6f6 https://phabricator.wikimedia.org/T348343

Exploits

https://phabricator.wikimedia.org/T348343 https://phabricator.wikimedia.org/T348343

Frequently Asked Questions

What is CVE-2024-23171? +

An issue was discovered in the CampaignEvents extension in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. The Special:EventDetails page allows XSS via the x-xss language setting for internationalization (i18n). It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2024-23171? +

CVE-2024-23171 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-23171? +

CVE-2024-23171 affects products from mediawiki, specifically: mediawiki. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-23171? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-23171