4.6

CVE-2025-6590: wikimedia foundation mediawiki

CVSS: 4.6v4.0MediumDeferred
AliasesUBUNTU-CVE-2025-6590DEBIAN-CVE-2025-6590
Published 02-02-2026Last modified 03-02-2026
Open JSON

Vulnerability summary

CVE-2025-6590 is a medium (CVSS 4.6) vulnerability in wikimedia foundation mediawiki. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.3% of scored vulnerabilities.

Overall risk
18/100
0100
Low · default modelHow is this calculated?
CVSS score
4.6/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.37%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
DLA-4249-1DSA-5957-1

Timeline

  1. 02-02-2026
    PublishedVulnerability first disclosed.
  2. 03-02-2026
    Last modifiedVulnerability information updated.

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/htmlform/fields/HTMLUserTextField.Php. This issue affects MediaWiki: from * through 1.39.12, 1.42.76 1.43.1, 1.44.0.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

-0.01 pp

From 0.38% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.37%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • mediawiki< 1:1.39.13-1~deb12u1 | < 1:1.43.3+dfsg-1
Ubuntu1 product
  • mediawikiAll versions (No fix recorded)
Wikimedia foundation1 product

3 vendors · 3 products

References

7 links