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CVE-2021-43810

Cross-site Scripting (XSS) when redirect an url

MEDIUM
6.1
CVSS Score
Published: December 7, 2021 at 10:00 PM UTC
Updated: June 17, 2026 at 04:11 AM UTC
1 product affected across 1 vendorAdmidio

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Severity
MEDIUM6.1
Exploit prediction
EPSS 5%

Description

Admidio is a free open source user management system for websites of organizations and groups. A cross-site scripting vulnerability is present in Admidio prior to version 4.0.12. The Reflected XSS vulnerability occurs because redirect.php does not properly validate the value of the url parameter. Through this vulnerability, an attacker is capable to execute malicious scripts. This issue is patched in version 4.0.12.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Admidio· Admidio
95%
v < 4.0.12
Affected range stops below 4.0.12, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/Admidio/admidio/commit/c043267d362f7813543cc2785119bf3e3e54fe21
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/Admidio/admidio/commit/fcb0609abc1d2f65bc1377866bd678e5d891404b
x_refsource_MISCPatchRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/Admidio/admidio/releases/tag/v4.0.12
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/Admidio/admidio/security/advisories/GHSA-3qgf-qgc3-42hh

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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