CVE-2021-31547 Information disclosure in n/a
Unprivileged users can reveal suppressed edits and usernames via crafted AbuseFilter rules in the MediaWiki AbuseFilter extension.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-31547?
CVE-2021-31547 is a medium-severity vulnerability in Mediawiki Mediawiki, published on 22 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. Its AbuseFilterCheckMatch API reveals suppressed edits and usernames to unprivileged users through the iteration of crafted AbuseFilter rules.
Weakness: CWE-200
Which versions are affected by CVE-2021-31547?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.35.3 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2021-31547?
Upgrade mediawiki to 1.35.3 or later.
Is CVE-2021-31547 being exploited?
There is no known exploitation of CVE-2021-31547 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-31547, GHSA-x7v9-mpxr-pg87.