CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities catalog.

Remediation Deadline: Oct 20, 2025

High

CISA KEV

CVE-2021-21311

Adminer—Adminer

Adminer contains a server-side request forgery vulnerability that, when exploited, allows a remote attacker to obtain potentially sensitive information.

Required Action

https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6 ; https://nvd.nist.gov/vuln/detail/CVE-2021-21311

Vulnerability Overview

Severity: High
CISA KEV: Yes
Ransomware: Unknown
Published: Sep 29, 2025
KEV Added: Sep 29, 2025
Due Date: Oct 20, 2025
Related Articles: 0

Vendor

Adminer