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Case File

CVE-2021-42077

CRITICAL · CVSS 9.8 EPSS 2.43% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-08 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

External Security References
packetstormsecurity.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-42077
Severity
CRITICAL
CVSS
9.8
EPSS
2.43%

Original NVD Description

PHP Event Calendar before 2021-09-03 allows SQL injection, as demonstrated by the /server/ajax/user_manager.php username parameter. This can be used to execute SQL statements directly on the database, allowing an adversary in some cases to completely compromise the database system. It can also be used to bypass the login form.