Vulnerability · Published Jul 3, 2025 · Assigned by wikimedia-foundation

CVE-2025-53500Stored XSS in MassEditRegex

Medium 5.6

In plain English

A medium-severity cross-site scripting in Mediawiki - MassEditRegex Extension from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)5.6Medium

Exploit odds (30 days)0.3%top 79.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - MassEditRegex Extension allows Stored XSS.This issue affects Mediawiki - MassEditRegex Extension: from 1.39.X before 1.39.12, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

Affected products (as reported)

Vendor	Product	Versions
Wikimedia Foundation	Mediawiki - MassEditRegex Extension	1.39.x – before 1.39.131.42.x – before 1.42.71.43.x – before 1.43.2

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

In plain English

Official description

Affected products (as reported)

References