XSS in Admidio

CVE-2021-43810

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.058 (92.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-43810?
CVE-2021-43810 is a high-severity vulnerability in Admidio, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2021-12-07.
How severe is CVE-2021-43810?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-43810 known to be exploited?
4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.