CVE-2020-35480

Description

An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.34%
Vendor Advisory debian.org Vendor Advisory fedoraproject.org Vendor Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://phabricator.wikimedia.org/T120883 permissions required
https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html vendor advisory mailing list release notes
https://www.debian.org/security/2020/dsa-4816 vendor advisory mailing list third party advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-35480?
CVE-2020-35480 has been scored as a medium severity vulnerability.
How to fix CVE-2020-35480?
To fix CVE-2020-35480, 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-2020-35480 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-35480 is being actively exploited. 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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