CVE-2020-29003 Cross-site scripting in n/a
Attackers can inject malicious scripts via poll answer options in the MediaWiki PollNY extension, potentially compromising user sessions.
- 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-2020-29003?
CVE-2020-29003 is a medium-severity cross-site scripting vulnerability in Mediawiki Mediawiki, published on 24 Nov 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The PollNY extension for MediaWiki through 1.35 allows XSS via an answer option for a poll question, entered during Special:CreatePoll or Special:UpdatePoll.
Weakness: CWE-79
Which versions are affected by CVE-2020-29003?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.35.1 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2020-29003?
Upgrade mediawiki to 1.35.1 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-2020-29003 being exploited?
There is no known exploitation of CVE-2020-29003 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2020-29003, GHSA-6f9q-3x2v-r6cg, UBUNTU-CVE-2020-29003.