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GHSA-m5m2-h6h9-p2c8

MediumCVSS 6.3 / 10
Published Sep 4, 2023·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

Impact

It is possible in XWiki to execute Velocity code without having script right by creating an XClass with a property of type "TextArea" and content type "VelocityCode" or "VelocityWiki". For the former, the syntax of the document needs to be set the xwiki/1.0 (this syntax doesn't need to be installed). In both cases, when adding the property to an object, the Velocity code is executed regardless of the rights of the author of the property (edit right is still required, though). In both cases, the code is executed with the correct context author so no privileged APIs can be accessed. However, Velocity still grants access to otherwise inaccessible data and APIs that could allow further privilege escalation.

At least for "VelocityCode", this behavior is most likely very old but only since XWiki 7.2, script right is a separate right, before that version all users were allowed to execute Velocity and thus this was expected and not a security issue.

Patches

This has been patched in XWiki 14.10.10 and 15.4 RC1.

Workarounds

There are no known workarounds.

References

  • https://jira.xwiki.org/browse/XWIKI-20847
  • https://jira.xwiki.org/browse/XWIKI-20848
  • https://github.com/xwiki/xwiki-platform/commit/edc52579eeaab1b4514785c134044671a1ecd839
Risk Scores
Base Score
6.3

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data. There is a low impact on the availability of the system.

Threat Intelligence
5.8

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2023-41046
    Alias
  • EUVD-2023-2543
    Alias

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Medium severity
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