CVE-2020-35623: Input Validation
First published: Mon Dec 21 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MediaWiki | <=1.35.1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2020-35623?
CVE-2020-35623 has a medium severity due to the potential for user impersonation.
How do I fix CVE-2020-35623?
To fix CVE-2020-35623, update the CasAuth extension for MediaWiki to versions later than 1.35.1.
Which versions of MediaWiki are affected by CVE-2020-35623?
CVE-2020-35623 affects MediaWiki versions up to and including 1.35.1.
What type of vulnerability is CVE-2020-35623?
CVE-2020-35623 is an authentication vulnerability related to improper username validation.
Can an ordinary user exploit CVE-2020-35623?
Yes, an ordinary user can exploit CVE-2020-35623 to impersonate a bureaucrat user with specific username manipulations.
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