Adminer Server-Side Request Forgery Vulnerability (CVE-2021-21311)
Severity: high · Patch status: patched · Since 2025-09-29 · CVE-2021-21311
Adminer contains a server-side request forgery vulnerability that, when exploited, allows a remote attacker to obtain potentially sensitive information. CISA added CVE-2021-21311 to its Known Exploited Vulnerabilities catalog on Sep 29, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Oct 20, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
