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CVE-2021-43810

33
FAUCET Score

CVE-2021-43810 is a reflected cross-site scripting (XSS) vulnerability affecting Admidio, a free open-source user management system, in versions prior to 4.0.12. This medium-severity vulnerability (CVSS 6.1) allows an unauthenticated attacker to execute malicious scripts by manipulating the 'url' parameter in redirect.php, requiring user interaction. While there is no evidence of active exploitation, a Nuclei template exists for detection, and there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.0.12CPE matchmatch criteria
cpe:2.3:a:admidio:admidio:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.78%
Probability of exploitation in next 30 days
EPSS Percentile
92.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-43810 · Jan 25, 2022
This CVE's current EPSS score of 0.0578 is in the 97th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / Admidio/admidio/commit/c043267d362f7813543cc2785119bf3e3e54fe21
PatchThird Party Advisory
github.com / Admidio/admidio/commit/fcb0609abc1d2f65bc1377866bd678e5d891404b
PatchThird Party Advisory
github.com / Admidio/admidio/releases/tag/v4.0.12
PatchRelease NotesThird Party Advisory
github.com / Admidio/admidio/security/advisories/GHSA-3qgf-qgc3-42hh
Third Party Advisory