CVE-2021-30153 json
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.
published 2023-04-15 3 y ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2021-30153 , EUVD-2021-17089
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami mediawiki 1.31.13, 1.35.2
- mediawiki mediawiki 1.31.13, 1.35.2
- mediawiki Debian 14, Debian 13, Debian 12 1:1.35.2-1
debian advisories DEBIAN-CVE-2021-30153
- mediawiki Arch Linux 1.35.2-1
arch linux advisories AVG-1775
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- phabricator.wikimedia.org https://phabricator.wikimedia.org/T270453 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mediawiki | <1.31.13 >=1.32.0, <1.35.2 |
1.31.13 1.35.2 |
Classification
- Weakness
-
- CWE-668 Exposure of Resource to Wrong Sphere
References
-
lists.wikimedia.org
/pipermail/wikitech-l/2021-April/094418.html
mailing-list, patch, vendor-advisory, web
-
phabricator.wikimedia.org
/T270453
exploit, vendor-advisory, web
-
lists.wikimedia.org
/hyperkitty/list/wikitech-l%40lists.wikimedia.org/message/XYBF5RSTJRMVCP7QBYK7643W75A3KCIY/
web
-
nvd.nist.gov
/vuln/detail/CVE-2021-30153
web
Sources
- CVE List CVE-2021-30153
- NVD CVE-2021-30153
- OSV BIT-mediawiki-2021-30153
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.