EIP-2026-110959

PRE-CVE

phpBB 2.0.21 - Poison Null Byte Remote File Upload

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-110959. PoCs published by ShAnKaR.

AI-analyzed exploit summary This Perl script exploits a poison NULL byte vulnerability in phpBB 2.0.21 to manipulate avatar file locations, allowing arbitrary file uploads. It authenticates as an admin, modifies the avatar path to include a NULL byte, and potentially enables remote code execution via malicious file uploads.

Description

phpBB 2.0.21 - Poison Null Byte Remote File Upload

Exploits (1)

exploitdb WORKING POC VERIFIED
by ShAnKaR · perlwebappsphp
https://www.exploit-db.com/exploits/2348

This Perl script exploits a poison NULL byte vulnerability in phpBB 2.0.21 to manipulate avatar file locations, allowing arbitrary file uploads. It authenticates as an admin, modifies the avatar path to include a NULL byte, and potentially enables remote code execution via malicious file uploads.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: phpBB 2.0.21
Auth required
Prerequisites: Valid admin credentials · Access to the target phpBB instance · Avatar upload functionality enabled
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026