EIP-2026-100883

PRE-CVE

Proofpoint Protection Server 5.5.5 - 'process.cgi' Cross-Site Scripting

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-100883. PoCs published by Karan Khosla.

AI-analyzed exploit summary This exploit demonstrates a cross-site scripting (XSS) vulnerability in Proofpoint Protection Server. The vulnerability arises from insufficient sanitization of user-supplied data, allowing arbitrary script execution in the context of the affected site.

Description

Proofpoint Protection Server 5.5.5 - 'process.cgi' Cross-Site Scripting

Exploits (1)

exploitdb WORKING POC VERIFIED
by Karan Khosla · textwebappscgi
https://www.exploit-db.com/exploits/35698

This exploit demonstrates a cross-site scripting (XSS) vulnerability in Proofpoint Protection Server. The vulnerability arises from insufficient sanitization of user-supplied data, allowing arbitrary script execution in the context of the affected site.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Proofpoint Protection Server 5.5.5
No auth needed
Prerequisites: Access to the vulnerable endpoint · User interaction (e.g., mouseover event)
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026