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GHSA-793w-g325-hrw2

CriticalCVSS 9 / 10
Published Jun 30, 2023·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

Effect

Any user with edit rights can edit all pages in the `CKEditor' space. This makes it possible to perform a variety of harmful actions, such as

  • removing technical documents, leading to loss of service
  • Editing the javascript configuration of CKEditor, leading to persistent XSS

Patches

This issue has been patched in XWiki 14.10.6 and XWiki 15.1. This issue has been patched on the CKEditor Integration extension 1.64.9 for XWiki version older than 14.6RC1.

Workarounds

The issue can be fixed manually by restricting the edit and delete rights to a trusted user or group (e.g. the XWiki.XWikiAdminGroup group), implicitly disabling those rights for all other users. See https://github.com/xwiki/xwiki-platform/commit/9d9d86179457cb8dc48b4491510537878800be4f

References

  • https://jira.xwiki.org/browse/XWIKI-20590
  • https://jira.xwiki.org/browse/CKEDITOR-508
  • https://github.com/xwiki/xwiki-platform/commit/9d9d86179457cb8dc48b4491510537878800be4f

For more information

If you have any questions or comments about this advisory:

Risk Scores
Base Score
9.0

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. The attacker needs the user to perform some action, like clicking a link. 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
8.2

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.90%

The exploit probability is very low. The vulnerability is unlikely 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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