Exploitation Summary
EIP tracks 1 public exploit for EIP-2026-107528. PoCs published by David Suzanne.
AI-analyzed exploit summary The exploit demonstrates an HTML injection vulnerability in GuppY's 'postguest.php' script, specifically via the '[c]' tag, allowing arbitrary script execution. The provided payload '[c=expression(alert('unsecure'))]texte[/c]' confirms the flaw by injecting JavaScript into the portal.
Description
GuppY 2.4 - HTML Injection
Exploits (1)
exploitdb
WORKING POC
VERIFIED
by David Suzanne · textwebappsphp
https://www.exploit-db.com/exploits/23192
The exploit demonstrates an HTML injection vulnerability in GuppY's 'postguest.php' script, specifically via the '[c]' tag, allowing arbitrary script execution. The provided payload '[c=expression(alert('unsecure'))]texte[/c]' confirms the flaw by injecting JavaScript into the portal.
Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target:
GuppY version 2.4p1 and earlier
No auth needed
Prerequisites:
Access to the GuppY portal's forum or guestbook
MITRE ATT&CK
mistral-large-3 · analyzed Feb 18, 2026
Full analysis →
Details
Status
pre_cve
Tracked Since
Feb 18, 2026