Vulnerability · Published May 25, 2022 · Assigned by GitHub_M
CVE-2022-30999Possible cross-site scripting attack via unsanitized SVG files in FoF Upload
High 8.7
In plain English
A high-severity cross-site scripting in upload from FriendsOfFlarum. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FriendsofFlarum (FoF) Upload is an extension that handles file uploads intelligently for your forum. If FoF Upload prior to version 1.2.3 is configured to allow the uploading of SVG files ('image/svg+xml'), navigating directly to an SVG file URI could execute arbitrary Javascript code decided by an attacker. This Javascript code could include the execution of HTTP web requests to Flarum, or any other web service. This could allow data to be leaked by an authenticated Flarum user, or, possibly, for data to be modified maliciously. This issue has been patched with v1.2.3, which now sanitizes uploaded SVG files. As a workaround, remove the ability for users to upload SVG files through FoF Upload.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | fof/upload | 1.2.3 | GHSA-fm53-mpmp-7qw2 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| FriendsOfFlarum | upload | < 1.2.3 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
References
- https://github.com/FriendsOfFlarum/upload/security/advisories/GHSA-fm53-mpmp-7qw2 x_refsource_CONFIRM
- https://github.com/FriendsOfFlarum/upload/issues/68 x_refsource_MISC
- https://github.com/FriendsOfFlarum/upload/pull/318 x_refsource_MISC
- https://github.com/FriendsOfFlarum/upload/releases/tag/1.2.3 x_refsource_MISC