Improper input validation in MediaWiki
CVE-2020-35623
An issue was discovered in the CasAuth extension for MediaWiki through 1.35.1. Due to improper username validation, it allowed user impersonation with trivial manipulations of certain characters within a given username. An ordinary user may be able to login as a "bureaucrat user" who has a similar username, as demonstrated by usernames that differ only in (1) bidirectional override symbols or (2) blank space.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.011 (61.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Mediawiki
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-35623?
- CVE-2020-35623 is a high-severity vulnerability in MediaWiki, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-12-21.
- How severe is CVE-2020-35623?
- High severity. CVSS v3 base score is 7.5 out of 10.