CVE-2020-35622 Cross-site scripting in n/a

What is CVE-2020-35622?

CVE-2020-35622 is a medium-severity cross-site scripting vulnerability in Mediawiki Mediawiki, published on 21 Dec 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An issue was discovered in the GlobalUsage extension for MediaWiki through 1.35.1. SpecialGlobalUsage.php calls WikiMap::makeForeignLink unsafely. The $page variable within the formatItem function was not being properly escaped, allowing for XSS under certain conditions.

Weakness: CWE-79

Which versions are affected by CVE-2020-35622?

1 open source package ship an affected version, including mediawiki. It affects 1 product.

Products include Mediawiki Mediawiki.

How do I fix CVE-2020-35622?

Upgrade mediawiki to 1.35.2 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-35622 being exploited?

There is no known exploitation of CVE-2020-35622 in the wild and no public exploit code.

Other vulnerabilities in Mediawiki Mediawiki

• CVE-2023-37303 Denial of service in n/a Critical 9.8
• CVE-2022-29904 SQL injection in n/a Critical 9.8
• CVE-2022-29906 Missing authorization in n/a Critical 9.8
• CVE-2022-28205 Business logic in n/a Critical 9.8
• CVE-2022-28206 Missing authorization in n/a Critical 9.8

All Mediawiki Mediawiki vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-mediawiki-2020-35622, GHSA-p7rw-422j-w7qg.