Potential javascript injection attack enabled by Unicode normalization in Action API

published 2025-04-10 18 mo ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2025-32699 , EUVD-2025-10707

cvss: 2.1; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

Vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Parsoid.This issue affects MediaWiki: before 1.39.12, 1.42.6, 1.43.1; Parsoid: before 0.16.5, 0.19.2, 0.20.2.

Patch / fix

fixed in 3 distros 1

bitnami mediawiki 1.41.1, 1.43.1
Wikimedia Foundation MediaWiki 1.39.12, 1.42.6, 1.43.1
Wikimedia Foundation Parsoid 0.16.5, 0.19.2, 0.20.2

mediawiki Debian 12 1:1.39.12-1~deb12u1
mediawiki Debian 14, Debian 13 1:1.43.1+dfsg-1

debian advisories DEBIAN-CVE-2025-32699

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-10)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.1	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/RE:M/U:Amber
CNA	4.0	2.1	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:M/U:Amber

Affected packages

ecosystem	package	affected	fixed in
bitnami	mediawiki	<1.41.1 >=1.42.0, <1.43.1	1.41.1 1.43.1

Affected products

Wikimedia Foundation MediaWiki
Wikimedia Foundation Parsoid

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary