CVE-2023-41318 Unsafe media served inline on download endpoints in matrix-media-repo
Attackers can execute scripts via malicious SVG media served inline, requiring operators to upgrade matrix-media-repo.
- 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-2023-41318?
CVE-2023-41318 is a medium-severity cross-site scripting vulnerability in turt2live matrix-media-repo, published on 8 Sep 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
matrix-media-repo is a highly customizable multi-domain media repository for the Matrix chat ecosystem. In affected versions an attacker could upload a malicious piece of media to the media repo, which would then be served with `Content-Disposition: inline` upon download. This vulnerability could be leveraged to execute scripts embedded in SVG content. Commits `77ec235` and `bf8abdd` fix the issue and are included in the 1.3.0 release. Operators should upgrade to v1.3.0 as soon as possible. Operators unable to upgrade should override the `Content-Disposition` header returned by matrix-media-repo as a workaround.
Weakness: CWE-79
Which versions are affected by CVE-2023-41318?
3 open source packages ship an affected version, including github.com/turt2live/matrix-media-repo. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/turt2live/matrix-media-repo Go | All versions | 1.3.0 |
github.com/turt2live/matrix-media-repo Go | All versions | 1.3.0 |
github.com/turt2live/matrix-media-repo Go | All versions | 1.3.0 |
Products include Turt2live Matrix-Media-Repo.
How do I fix CVE-2023-41318?
Upgrade github.com/turt2live/matrix-media-repo to 1.3.0 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-2023-41318 being exploited?
There is no known exploitation of CVE-2023-41318 in the wild and no public exploit code.
Sources
Also known as GHSA-5crw-6j7v-xc72, GO-2023-2053.