VULNERABILITY INTELLIGENCE

CVE-2021-42077

CVSS score9.8 CRITICAL
EPSS probability2.51%
CISA KEVNot currently listed
Published2021-11-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-89

Primary references