Reflected cross-site scripting in Admidio redirect page
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Admidio 4.0.12 through 4.3.17 and 5.0.0 before 5.0.15 contains a reflected cross-site scripting flaw in system/redirect.php (CWE-79). The url GET parameter is not properly validated because of an incomplete fix for CVE-2021-43810, so a crafted javascript URL with a decoy http segment passes the check. An unauthenticated attacker can get script to run in the Admidio origin if a victim clicks a crafted redirect link.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
Admidio 4.0.12 through 4.3.17 and 5.0.0 before 5.0.15 contains a reflected cross-site scripting vulnerability in system/redirect.php that allows unauthenticated attackers to inject JavaScript via the url GET parameter, due to an incomplete fix for CVE-2021-43810. Attackers can craft a javascript: URL containing a decoy http:// segment that passes validation and executes script in the Admidio origin when victims click the redirect link.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Upgrade Admidio to version 5.0.15 or later. The sources list no fixed version for the 4.x branch.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA admidio (Admidio) Fixed in 5.0.15
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
admidio 5.0.15
3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-71144 Stored cross-site scripting in Admidio registration namePriority MEDIUM 57
- TI-2026-71145 Cross-organization access control bypass in AdmidioPriority LOW 37
Timeline
- 2026-10-12 Threatist record created from CVE-2026-109327
- 2026-10-12 Alias added: GHSA-7p8w-m95g-69jq
- 2026-10-15 CISA SSVC decision points changed
- 2026-10-15 Priority changed: LOW → MEDIUM
References
More Admidio vulnerabilities
- TI-2026-25286 Admidio is Missing Authorization and CSRF Protection on Document and Folder Deletion CVSS 3.1CRITICAL 9.1
- TI-2026-56995 Admidio before 5.0.12 Authentication Bypass via RSS feeds CVSS 4.0HIGH 8.7
- TI-2026-56993 Admidio before 5.0.12 SQL Injection via relation_type_list CVSS 4.0HIGH 8.7
- TI-2024-25222 Admidio has Blind SQL Injection in ecard_send.php CVSS 3.1CRITICAL 10.0
- TI-2026-30186 Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed CVSS 3.1HIGH 8.2
- TI-2024-25764 Admidio Vulnerable to RCE via Arbitrary File Upload in Message Attachment CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-109327 · CVE Program
- CVE-2026-109327 · NVD
- FIRST EPSS
- GHSA-7p8w-m95g-69jq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences