CVE-2021-43810

Name: CVE-2021-43810
Creator: NVD / NIST
Published: 2021-12-07T22:15:06.997+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 5.78%

Last modified Jun 17, 2026

CVE-2021-43810 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 5.78% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

5.78%

92.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Admidio	Admidio	< 4.0.12

References

https://github.com/Admidio/admidio/commit/c043267d362f7813543cc2785119bf3e3e54fe21Patch, Third Party Advisory
https://github.com/Admidio/admidio/commit/fcb0609abc1d2f65bc1377866bd678e5d891404bPatch, Third Party Advisory
https://github.com/Admidio/admidio/releases/tag/v4.0.12Patch, Release Notes, Third Party Advisory
https://github.com/Admidio/admidio/security/advisories/GHSA-3qgf-qgc3-42hhThird Party Advisory
https://github.com/Admidio/admidio/commit/c043267d362f7813543cc2785119bf3e3e54fe21Patch, Third Party Advisory
https://github.com/Admidio/admidio/commit/fcb0609abc1d2f65bc1377866bd678e5d891404bPatch, Third Party Advisory
https://github.com/Admidio/admidio/releases/tag/v4.0.12Patch, Release Notes, Third Party Advisory
https://github.com/Admidio/admidio/security/advisories/GHSA-3qgf-qgc3-42hhThird Party Advisory

Timeline

Published: Dec 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43810?

How severe is CVE-2021-43810?

CVE-2021-43810 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 5.78% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43810?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43810?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST