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Users with SCRIPT right can execute arbitrary code in XWiki

Low severity GitHub Reviewed Published Sep 10, 2020 in xwiki/xwiki-platform • Updated Feb 1, 2023

Package

maven org.xwiki.platform:xwiki-platform-oldcore (Maven)

Affected versions

< 11.10.5
>= 12.0.0, < 12.2.1

Patched versions

11.10.5
12.2.1

Description

Impact

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.

Patches

It has been patched in both version XWiki 12.2.1 and XWiki 11.10.5.

Workarounds

The only workaround is to give SCRIPT right only to trusted users.

References

https://jira.xwiki.org/browse/XWIKI-17141
https://jira.xwiki.org/browse/XWIKI-17266

It's been reported by the GitHub Security Lab under #GHSL-2020-046.

For more information

If you have any questions or comments about this advisory:

References

@tmortagne tmortagne published to xwiki/xwiki-platform Sep 10, 2020
Reviewed Sep 10, 2020
Published to the GitHub Advisory Database Sep 10, 2020
Published by the National Vulnerability Database Sep 10, 2020
Last updated Feb 1, 2023

Severity

Low

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(72nd percentile)

Weaknesses

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Learn more on MITRE.

Improper Control of Generation of Code ('Code Injection')

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Learn more on MITRE.

CVE ID

CVE-2020-15171

GHSA ID

GHSA-7qw5-pqhc-xm4g

Source code

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