Cyber Resilience

CVE-2025-67484

Low

Published: 03 February 2026

Published
03 February 2026
Modified
14 April 2026
KEV Added
—
Patch
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CVSS Score v4 0.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/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:X/U:X
EPSS Score 0.0040 31.3th percentile
Risk Priority 0 floored blend · peak EPSS

Summary

CVE-2025-67484 is a uncategorised-severity Improper Input Validation (CWE-20) vulnerability in Mediawiki Mediawiki. Its CVSS base score is 0.0.

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 31.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2025-67484 is a vulnerability in the Wikimedia Foundation's MediaWiki software, specifically associated with the program file includes/Api/ApiFormatXml.php. It affects MediaWiki versions from any release prior to 1.39.16, 1.43.6, 1.44.3, and 1.45.1. Classified under CWE-20 (Improper Input Validation), the issue carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), marking it as critical severity.

The vulnerability enables exploitation over the network by unauthenticated attackers (PR:N) with low attack complexity (AC:L) and no requirement for user interaction (UI:N). Successful exploitation can achieve high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) within the unchanged scope (S:U), potentially allowing remote compromise of affected MediaWiki instances.

Mitigation is addressed through patches in the specified versions: upgrade to MediaWiki 1.39.16 or later (1.39 branch), 1.43.6 or later (1.43 branch), 1.44.3 or later (1.44 branch), or 1.45.1 or later (1.45 branch). Further details are provided in the Wikimedia Phabricator task at https://phabricator.wikimedia.org/T401995.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiFormatXml.Php. This issue affects MediaWiki: from * before 1.39.16, 1.43.6, 1.44.3, 1.45.1.

CWE(s)
CWE-20

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Direct remote unauthenticated exploitation of a public-facing web application (MediaWiki API endpoint) via improper input validation, enabling full system compromise.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-0669Same product: Mediawiki Mediawiki
CVE-2025-48913Shared CWE-20
CVE-2026-4755Shared CWE-20
CVE-2026-23489Shared CWE-20
CVE-2025-54385Shared CWE-20
CVE-2026-48188Shared CWE-20
CVE-2026-22567Shared CWE-20
CVE-2026-26063Shared CWE-20
CVE-2024-36047Shared CWE-20
CVE-2025-37173Shared CWE-20

Affected Assets

mediawiki
mediawiki
1.45.0 · 1.39.0 — 1.39.16 · 1.43.0 — 1.43.6 · 1.44.0 — 1.44.3

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Mandates timely identification, reporting, and correction of software flaws like this critical CWE-20 input validation vulnerability in MediaWiki's ApiFormatXml.php via patching to fixed versions.

SI-10 Information Input Validation good match
prevent

Requires systems to validate all inputs, directly countering the improper input validation (CWE-20) in the MediaWiki API XML format handler exploited by unauthenticated remote attackers.

RA-5 Vulnerability Monitoring and Scanning partial match
detect

Enables regular vulnerability scanning to identify and prioritize known issues like CVE-2025-67484 in vulnerable MediaWiki versions for remediation.

References