Users with SCRIPT rights can execute arbitrary code in XWiki

published 2020-09-10 6 y ago modified 2026-07-08 4 mo ago also GHSA-7qw5-pqhc-xm4g , EUVD-2020-0862

cvss: 6.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

In XWiki before versions 11.10.5 or 12.2.1, any user with SCRIPT right (EDIT right before XWiki 7.4) can gain access to the application server Servlet context which contains tools allowing to instantiate arbitrary Java objects and invoke methods that may lead to arbitrary code execution. The only workaround is to give SCRIPT right only to trusted users.

Patch / fix

fixed in 2

maven org.xwiki.platform:xwiki-platform-oldcore 11.10.5, 12.2.1
xwiki xwiki 11.10.5, 12.2.1

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.6	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	6.6	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.0	AV:N/AC:M/Au:S/C:P/I:P/A:P
GitHub	3.1	6.6	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.xwiki.platform:xwiki-platform-oldcore	<11.10.5 >=12.0.0, <12.2.1	11.10.5 12.2.1

Affected products

xwiki xwiki-platform

Classification

Weakness

CWE-94 Improper Control of Generation of Code
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

github.com /xwiki/xwiki-platform/security/advisories/GHSA-7qw5-pqhc-xm4g
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-15171
advisory
github.com /xwiki/xwiki-platform
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary