CSRF in MediaWiki
CVE-2015-8623
The User::matchEditToken function in includes/User.php in MediaWiki before 1.23.12 and 1.24.x before 1.24.5 does not perform token comparison in constant time before returning, which allows remote attackers to guess the edit token and bypass CSRF protection via a timing attack, a different vulnerability than CVE-2015-8624.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- MediaWiki — versions 1.24.0, 1.24.1, 1.24.2
Weakness classification (CWE)
References
- lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.html (Vendor Advisory, mailing-list, Patch, Release Notes)
- www.openwall.com/lists/oss-security/2015/12/23/7 (mailing-list, Patch, Mailing List, Third Party Advisory)
- phabricator.wikimedia.org/T119309 (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2015/12/21/8 (mailing-list, Patch, Mailing List, Third Party Advisory)
- gerrit.wikimedia.org/r/ (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2015-8623?
- CVE-2015-8623 is a high-severity vulnerability in MediaWiki, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2017-03-23.
- How severe is CVE-2015-8623?
- High severity. CVSS v3 base score is 8.8 out of 10.