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GHSA-3989-4c6x-725f

CriticalCVSS 9.9 / 10

Published Apr 20, 2023·Last modified Nov 8, 2023

Affected Components(0)

No affected components available

Description

Impact

Any user with view rights on XWiki.AttachmentSelector can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping in the "Cancel and return to page" button. This page is installed by default.

See https://jira.xwiki.org/browse/XWIKI-20275 for the reproduction steps.

Patches

The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11.

Workarounds

The issue can be fixed by applying this patch on XWiki.AttachmentSelector.

References

https://github.com/xwiki/xwiki-platform/commit/aca1d677c58563bbe6e35c9e1c29fd8b12ebb996
https://jira.xwiki.org/browse/XWIKI-20275

For more information

If you have any questions or comments about this advisory:

Open an issue in Jira XWiki.org
Email us at Security Mailing List

Risk Scores

Base Score

9.9

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 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 low 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

65.87%

The exploit probability is very high. The vulnerability is very likely to be exploited in 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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