Vulnerability Report

CVE-2026-33229

Title: Sandbox bypass and RCE in XWiki Platform

Other

Proof Of Concept

PoC Available for CVE-2026-33229

CWE Category CWE-862

Published Date Apr 08, 2026

Modified Date Jul 24, 2026

Exploit Status Available

Score 8.6 CVSS v4.0

Exploit Probability (EPSS)

0.54%

Vulnerability Summary

CVE-2026-33229: XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Prior to 17.4.8 and 17.10.1, an improperly protected scripting API allows any user with script right to bypass the sandboxing of the Velocity scripting API and execute, e.g., arbitrary Python scripts, allowing full access to the XWiki instance and thereby compromising the confidentiality, integrity and availability of the whole instance. Note that script right already constitutes a high level of access that we don't recommend giving to untrusted users. This vulnerability is fixed in 17.4.8 and 17.10.1.

Impacted Vendors

xwiki 1

Reference Links

https://github.com/xwiki/xwiki-platform/commit/9fe84da66184c05953df9466cf3a4acd15a46e63 https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-h259-74h5-4rh9 https://jira.xwiki.org/browse/XWIKI-23698 https://jira.xwiki.org/browse/XWIKI-23702

CVSS v4.0

Source Entity [email protected]

Severity HIGH

8.6

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0

Severity CRITICAL

9.8