Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Flarum's flarum/core and flarum/framework Packagist packages before 1.8.0 are vulnerable to local file inclusion and blind server-side request forgery through avatar upload. An attacker with only a basic user account can upload a file containing a URL disguised with a spoofed MIME type, which the intervention/image package then fetches, allowing them to read local files or make server-side requests. Upgrade to flarum/core and flarum/framework 1.8.0 or later. As a temporary SSRF workaround, disable PHP's allow_url_fopen.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.1 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0050, the 43rd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:04 UTC First seen by agentprime
- 31 Oct 2026, 14:04 UTC Confirmed by OSV