CVE-2025-51863

MEDIUM

ChatGPT Unli thru 2025-05-26 - Stored Cross-Site Scripting via SVG File Upload

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-51863. PoCs published by Secsys-FDU.

AI-analyzed exploit summary The repository provides a technical description of a Self-XSS vulnerability in ChatGPTUtil, including attack vectors and a proof-of-concept payload. It lacks functional exploit code but includes detailed technical analysis of the vulnerability.

Description

Self Cross Site Scripting (XSS) vulnerability in ChatGPT Unli (ChatGPTUnli.com) thru 2025-05-26 allows attackers to execute arbitrary code via a crafted SVG file to the chat interface.

Exploits (1)

nomisec WRITEUP
by Secsys-FDU · poc
https://github.com/Secsys-FDU/CVE-2025-51863

The repository provides a technical description of a Self-XSS vulnerability in ChatGPTUtil, including attack vectors and a proof-of-concept payload. It lacks functional exploit code but includes detailed technical analysis of the vulnerability.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: ChatGPTUtil (version not specified)
No auth needed
Prerequisites: Victim interaction (pasting malicious payload into chat interface)
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 6.1
EPSS 0.0027
EPSS Percentile 18.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Published Jul 22, 2025
Tracked Since Feb 18, 2026