Input validation error in Flag attendance field - CVE-2026-55809
Published: June 18, 2026
Vulnerability identifier: #VU134779
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55809
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the PHP object injection issue in flag_attendance_field. A remote user can execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Flag attendance field
How to mitigate CVE-2026-55809
Install updates from vendor's website.
Flag attendance field - update to 1.2