CVE-2025-56536

MEDIUM

opennebula < 7.0.0 - Stored Cross-Site Scripting via User Information Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-56536. PoCs published by MarkArtamonov.

AI-analyzed exploit summary This repository documents a stored XSS vulnerability in OpenNebula's sunstone component, where a crafted payload in the user information parameter can execute arbitrary scripts. The writeup includes a payload example and screenshots demonstrating the exploit.

Description

A stored cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the user information parameter.

Exploits (1)

github WRITEUP
by MarkArtamonov · poc
https://github.com/MarkArtamonov/OpenNebula-CVE-2025-56536

This repository documents a stored XSS vulnerability in OpenNebula's sunstone component, where a crafted payload in the user information parameter can execute arbitrary scripts. The writeup includes a payload example and screenshots demonstrating the exploit.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: OpenNebula < 7.0 (opennebula-sunstone)
Auth required
Prerequisites: Access to modify user information in OpenNebula
devstral-2 · analyzed Apr 29, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 6.1
EPSS 0.0019
EPSS Percentile 8.2%
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
Products (1)
opennebula/opennebula < 7.0.0
Published Apr 29, 2026
Tracked Since Apr 29, 2026