4.3

CVE-2021-30153: mediawiki Exposure of Resource to Wrong Sphere

CVSS: 4.3v3.1MediumModified
AliasesDEBIAN-CVE-2021-30153
Published 15-04-2023Last modified 06-02-2025
Open JSON

Vulnerability summary

CVE-2021-30153 is a medium (CVSS 4.3) Exposure of Resource to Wrong Sphere vulnerability in mediawiki. EPSS estimates a 0.83% chance of exploitation in the next 30 days, higher than 57.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.83%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 15-04-2023
    PublishedVulnerability first disclosed.
  2. 06-02-2025
    Last modifiedVulnerability information updated.

Description

An issue was discovered in the VisualEditor extension in MediaWiki before 1.31.13, and 1.32.x through 1.35.x before 1.35.2. . When using VisualEditor to edit a MediaWiki user page belonging to an existing, but hidden, user, VisualEditor will disclose that the user exists. (It shouldn't because they are hidden.) This is related to ApiVisualEditor.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.83%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

0.00 pp

From 0.83% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.83%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (phabricator.wikimedia.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • mediawiki< 1:1.35.2-1
Mediawiki1 product

2 vendors · 2 products

References

4 links