CVE-2021-46146 Cross-site scripting in n/a
Cross-site scripting vulnerability in MediaWiki's WikibaseMediaInfo component allows attackers to inject malicious scripts via media file captions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-46146?
CVE-2021-46146 is a medium-severity cross-site scripting vulnerability in Mediawiki Mediawiki, published on 7 Jan 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. The WikibaseMediaInfo component is vulnerable to XSS via the caption fields for a given media file.
Weakness: CWE-79
Which versions are affected by CVE-2021-46146?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.35.5, 1.36.3, 1.37.1 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2021-46146?
Upgrade mediawiki to a fixed version for your release line: 1.35.5, 1.36.3 or 1.37.1.
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-2021-46146 being exploited?
There is no known exploitation of CVE-2021-46146 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-46146, GHSA-v84x-p2pv-wp5c.