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Reflected cross-site scripting in Admidio redirect page

Priority MEDIUM 56CWE-79Published · Updated

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

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00257 17th percentileScored 2026-11-07
Fix Fixed admidio (Admidio): 5.0.15

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

VendorProductAffected versionsFixed inStatusSource
Admidioadmidio4.0.12 – 4.3.17; 5.0.0 to before 5.0.155.0.15Patch availableCNA
  • admidio VendorAdmidio Affected 4.0.12 – 4.3.17; 5.0.0 to before 5.0.15 Fixed in 5.0.15 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:admidio:admidio:*:*:*:*:*:*:*:*——Admidio
  • cpe:2.3:a:admidio:admidio:*:*:*:*:*:*:*:* Versions — — ·Admidio

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

  1. 2026-10-12 Threatist record created from CVE-2026-109327
  2. 2026-10-12 Alias added: GHSA-7p8w-m95g-69jq
  3. 2026-10-15 CISA SSVC decision points changed
  4. 2026-10-15 Priority changed: LOW → MEDIUM

References

  • 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
See all 72 →

Sources