Authentication Bypass in Admidio's RSS Feed Module
CVE-2026-82657

8.7HIGH

Key Information:

Vendor

Admidio

Status
Admidio
Vendor
CVE Published:
30 August 2026

What is CVE-2026-82657?

Admidio versions prior to 5.0.12 are susceptible to an authentication bypass in their RSS feed endpoints for the forum and announcements modules. This vulnerability enables unauthenticated attackers to access sensitive information including forum topic titles, full post content, author identities, and timestamp details by issuing GET requests to the specific RSS feed URLs. As a result, unsecured access to this data poses a significant threat to user privacy and can lead to unauthorized information dissemination.

Affected Version(s)

admidio 0 < 5.0.12

admidio 5.0.12

References

https://github.com/Admidio/admidio/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/admidio-before-5.0.1...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

arpitjain099
.