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.
Published 2017-03-23 20:59:00
Updated 2017-03-27 13:47:23
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Cross-site request forgery (CSRF)

Products affected by CVE-2015-8623

Exploit prediction scoring system (EPSS) score for CVE-2015-8623

0.27%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 63 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2015-8623

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
NIST
8.8
HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2015-8623

  • The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2015-8623

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