XSS in Friendsofflarum Upload
CVE-2022-30999
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.012 (66.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Friendsofflarum Upload — versions < 1.2.3
Weakness classification (CWE)
References
- github.com/FriendsOfFlarum/upload/security/advisories/GHSA-fm53-mpmp-7qw2 (Third Party Advisory)
- github.com/FriendsOfFlarum/upload/issues/68 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/FriendsOfFlarum/upload/pull/318 (Patch, Third Party Advisory)
- github.com/FriendsOfFlarum/upload/releases/tag/1.2.3 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-30999?
- CVE-2022-30999 is a high-severity vulnerability in Friendsofflarum Upload, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2022-06-02.
- How severe is CVE-2022-30999?
- High severity. CVSS v3 base score is 8.7 out of 10.