CVE-2025-53494: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in W

Q: How do I fix CVE-2025-53494?

twocolconflict: upgrade to 2025-05-26. Exact commands for each OS are on this page.

Q: Is CVE-2025-53494 being exploited?

CVE-2025-53494 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-53494 affect?

CVE-2025-53494 affects twocolconflict. Severity is medium (CVSS 6.5). Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TwoColConflict Extension allows Stored XSS.This issue affects Mediawiki - TwoColConflict Extension

Q: How urgent is CVE-2025-53494?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 6.5REMOTEUPGRADE

CVE-2025-53494 is a medium-severity flaw (CVSS 6.5) affecting twocolconflict. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TwoColConflict Extension allows Stored XSS.This issue affects Mediawiki - TwoColConflict Extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-07-02
Last modified	2026-06-17

Publisher (CNA): wikimedia-foundation · Vendor: wmde-fisch

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-02 15:15 UTCPublished CVE record published
2026-06-17 09:38 UTCUpdated Record last modified

wmde-fisch twocolconflict UPGRADE

Affected: < 2025-05-26

Fixed in: 2025-05-26

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy twocolconflict || rpm -q twocolconflict || twocolconflict --version

2. UPGRADE to 2025-05-26 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade twocolconflict

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade twocolconflict

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-53494?

twocolconflict: upgrade to 2025-05-26. Exact commands for each OS are on this page.

Is CVE-2025-53494 being exploited?

CVE-2025-53494 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-53494 affect?

CVE-2025-53494 affects twocolconflict. Severity is medium (CVSS 6.5). Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TwoColConflict Extension allows Stored XSS.This issue affects Mediawiki - TwoColConflict Extension

How urgent is CVE-2025-53494?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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