Description
Pixelfed through 0.12.9 fails to validate follower status in StoryComposeController react and comment endpoints, allowing authenticated users to access follower-only stories. Attackers can enumerate sequential story IDs and submit reactions or comments to retrieve story media URLs and author information without following the account.
References6
- github.com/geo-chen/oss/blob/main/Pixelfed.md
- github.com/pixelfed/pixelfed
- github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/…
- github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/…
- github.com/pixelfed/pixelfed/blob/v0.12.9/routes/web-api.php#L1…
- www.vulncheck.com/advisories/pixelfed-through-0.12.9-unauthoriz…
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - CVSS 4.0
-
5.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 25 · as of 7 November 2026
- CWE
- CWE-862
Could this be exploited in your environment?
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