EIP-2026-106976

PRE-CVE

ExtCalendar2 - Cookie Authentication Bypass / Backdoor Upload

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-106976. PoCs published by Lagripe-Dz.

AI-analyzed exploit summary This exploit demonstrates an authentication bypass via SQL injection in ExtCalendar2 by manipulating cookie values, followed by uploading a PHP backdoor through file upload functionality. It achieves remote command execution by leveraging misconfigured file extension settings.

Description

ExtCalendar2 - Cookie Authentication Bypass / Backdoor Upload

Exploits (1)

exploitdb WORKING POC
by Lagripe-Dz · phpwebappsphp
https://www.exploit-db.com/exploits/17562

This exploit demonstrates an authentication bypass via SQL injection in ExtCalendar2 by manipulating cookie values, followed by uploading a PHP backdoor through file upload functionality. It achieves remote command execution by leveraging misconfigured file extension settings.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: ExtCalendar2 (version not specified, likely older versions)
No auth needed
Prerequisites: Target must have ExtCalendar2 installed with default or vulnerable settings · File upload functionality must be enabled · PHP execution must be allowed for uploaded files
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026