CVE-2021-21275 json
CSRF in MediaWiki Report extension
published 2021-01-25 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8648
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
The MediaWiki "Report" extension has a Cross-Site Request Forgery (CSRF) vulnerability. Before fixed version, there was no protection against CSRF checks on Special:Report, so requests to report a revision could be forged. The problem has been fixed in commit f828dc6 by making use of MediaWiki edit tokens.
Patch / fix
- report_project report 2021-01-21
Exploit prediction
0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- Kenny2github Report
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
github.com
/Kenny2github/Report/commit/f828dc6f73cdfaea5639edbf8ac7b326eeefb117
patch, third-party-advisory
-
github.com
/Kenny2github/Report/security/advisories/GHSA-9f3w-c334-jm2h
patch, third-party-advisory
-
oracle.com
//security-alerts/cpujul2021.html
third-party-advisory
-
oracle.com
/security-alerts/cpuapr2022.html
third-party-advisory
Sources
- CVE List CVE-2021-21275
- NVD CVE-2021-21275
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.