Auth bypass in MediaWiki
CVE-2021-30158
An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Blocked users are unable to use Special:ResetTokens. This has security relevance because a blocked user might have accidentally shared a token, or might know that a token has been compromised, and yet is not able to block any potential future use of the token by an unauthorized party.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.017 (76.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- MediaWiki
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T277009 (Exploit, Patch, Issue Tracking, Vendor Advisory)
- www.debian.org/security/2021/dsa-4889 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2021/05/msg00003.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/05/msg00006.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202107-40 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-30158?
- CVE-2021-30158 is a medium-severity vulnerability in MediaWiki, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-04-06.
- How severe is CVE-2021-30158?
- Medium severity. CVSS v3 base score is 5.3 out of 10.