CVE-2020-35623

Public Exploit

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.18%
Third-Party Advisory github.com Third-Party Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T263498 third party advisory exploit
https://github.com/CWRUChielLab/CASAuth/pull/11 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-35623?
CVE-2020-35623 has been scored as a high severity vulnerability.
How to fix CVE-2020-35623?
To fix CVE-2020-35623, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-35623 being actively exploited in the wild?
It is possible that CVE-2020-35623 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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