CVE-2021-36131 Cross-site scripting in n/a
A privileged user can inject arbitrary HTML and JavaScript into the SportsTeams extension, potentially compromising other users' sessions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-36131?
CVE-2021-36131 is a medium-severity cross-site scripting vulnerability in Mediawiki Mediawiki, published on 2 Jul 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
An XSS issue was discovered in the SportsTeams extension in MediaWiki through 1.36. Within several special pages, a privileged user could inject arbitrary HTML and JavaScript within various data fields. The attack could easily propagate across many pages for many users.
Weakness: CWE-79
Which versions are affected by CVE-2021-36131?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.36.1 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2021-36131?
Upgrade mediawiki to 1.36.1 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-2021-36131 being exploited?
There is no known exploitation of CVE-2021-36131 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-36131, GHSA-m3h7-84mr-jh3r.