CVE-2026-39935

State: PUBLISHED · Published: 2026-04-07 · Updated: 2026-04-08 · Assigner: wikimedia-foundation

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the `master` branch.

CWE

CWE-79 — CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

Affected

The Wikimedia Foundation / Mediawiki - CampaignEvents Extension — v=1.43 [affected]; v=1.44 [affected]; v=1.45 [affected]; v=0 <1.43 [affected]

CVSS

4.0 score=6.9 severity=MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

References

https://phabricator.wikimedia.org/T418254
https://gerrit.wikimedia.org/r/c/1249320

Source

cvelistV5-main/cves/2026/39xxx/CVE-2026-39935.json