What is CVE-2025-53369?

CVE-2025-53369 is a high-severity vulnerability in Starcitizentools Mediawiki-Extensions-Shortdescription, classified under Cross-site Scripting. CVSS score: 8.6/10. Published 2025-07-03.

How severe is CVE-2025-53369?

High severity. CVSS v3 base score is 8.6 out of 10.

XSS in Starcitizentools Mediawiki-Extensions-Shortdescription

CVE-2025-53369

Short Description is a MediaWiki extension that provides local short description support. In version 4.0.0, short descriptions are not properly sanitized before being inserted as HTML using mw.util.addSubtitle, allowing any user to insert arbitrary HTML into the DOM by editing a page. This issue has been patched in version 4.0.1.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (21.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.

Affected products

Starcitizentools Mediawiki-extensions-shortdescription — versions >= 05f6c6824f8f37dcc2d51cf6df4e7a09bea2196c, < 2c18bd21c5de53c336f55b6ff42f2983ea5796b4, >= 4.0.0, < 4.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-53369?: CVE-2025-53369 is a high-severity vulnerability in Starcitizentools Mediawiki-Extensions-Shortdescription, classified under Cross-site Scripting. CVSS score: 8.6/10. Published 2025-07-03.
How severe is CVE-2025-53369?: High severity. CVSS v3 base score is 8.6 out of 10.