High severity · published Aug 30, 2026
CVE-2026-82657
Admidio before 5.0.12 Authentication Bypass via RSS feeds
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AD
admidio · Admidio
before 5.0.12 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82657
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82657
github.com
https://github.com/Admidio/admidio/security/advisories/GHSA-mg9h-42f8-2pmm
www.vulncheck.com
https://www.vulncheck.com/advisories/admidio-before-5.0.12-authentication-bypass-via-rss-feeds
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