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GHSA-x2qm-r4wx-8gpg

CriticalCVSS 10 / 10
Published Mar 3, 2023·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

Impact

It's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the newThemeName request parameter (URL parameter), in combination with additional parameters form_token=1&action=create.

For instance: http://127.0.0.1:8080/xwiki/bin/view/FlamingoThemesCode/WebHomeSheet?newThemeName=foo%22%2F%7D%7D%7B%7Basync%20async%3D%22true%22%20cached%3D%22false%22%20context%3D%22doc.reference%22%7D%7D%7B%7Bgroovy%7D%7Dprintln(%22hello%20from%20groovy!%22)%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D&form_token=1&action=create will execute the following groovy code: println("hello from groovy!") on the server.

Patches

This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6.

Workarounds

It is possible to edit FlamingoThemesCode.WebHomeSheet and manually perform the changes from the patch fixing the issue.

References

  • https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284
  • https://jira.xwiki.org/browse/XWIKI-19757

For more information

If you have any questions or comments about this advisory:

Risk Scores
Base Score
10.0

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
9.1

Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.

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.

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Critical severity
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