CVE-2021-21311

Adminer — Adminer Server-Side Request Forgery Vulnerability

CISA KEV · in the CISA KEV catalog since 2025-09-29

What EVULNABLE says

EVULNABLE Risk · priority 84/100 Urgent Intelligence coverage 75/90 — no pre-patch disclosure data
Overdue by 10 monthsCISA KEVActively Exploited

Why it matters: Listed in the CISA KEV catalog, and an EPSS probability of 0.905.

Patch This Cycle

The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.

The evidence behind it

Published measurements for CVE-2021-21311
MeasureValueSource
CVSS base score 7.2 NVD
FIRST EPSS 0.905 (99.79th pctl) FIRST
Actively exploited Confirmed CISA KEV
Ransomware campaign use Unknown or none CISA KEV
CISA remediation deadline 2025-10-20 — Overdue by 10 months CISA KEV
Intelligence coverage 75/90 — no pre-patch disclosure data

What CISA says to do

This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.