CVE-2020-25812

Description

An issue was discovered in MediaWiki 1.34.x before 1.34.4. On Special:Contributions, the NS filter uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.36%
Vendor Advisory fedoraproject.org Vendor Advisory wikimedia.org Vendor Advisory wikimedia.org Vendor Advisory wikimedia.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gerrit.wikimedia.org/g/mediawiki/core/+/ad4a3ba45fb955aa8c0eb3c83809b16b40a498b9/includes/specials/SpecialContributions.php#592 vendor advisory
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html mailing list vendor advisory
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html mailing list vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-25812?
CVE-2020-25812 has been scored as a medium severity vulnerability.
How to fix CVE-2020-25812?
To fix CVE-2020-25812, 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-2020-25812 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-25812 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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