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GHSA-mwxj-g7fw-7hc8

CriticalCVSS 9.6 / 10
Published Jun 22, 2023·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

Impact

Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS). It's possible to exploit the restore template to perform a XSS, e.g. by using URL such as:

/xwiki/bin/view/XWiki/Main?xpage=restore&showBatch=true&xredirect=javascript:alert(document.domain)

This vulnerability exists since XWiki 9.4-rc-1.

Patches

The vulnerability has been patched in XWiki 14.10.5 and 15.1-rc-1.

Workarounds

It's possible to workaround the vulnerability by editing the template restore.vm to perform checks on it, but note that the appropriate fix involves new APIs that have been recently introduced in XWiki. See the referenced jira tickets.

References

  • Vulnerability in restore template: https://jira.xwiki.org/browse/XWIKI-20352
  • Introduction of the macro used for fixing this vulnerability: https://jira.xwiki.org/browse/XWIKI-20583
  • Commit containing the actual fix in the template: https://github.com/xwiki/xwiki-platform/commit/d5472100606c8355ed44ada273e91df91f682738

For more information

If you have any questions or comments about this advisory:

Attribution

Both vulnerabilities about the delete and restore templates have been reported by René de Sain @renniepak.

Risk Scores
Base Score
9.6

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. 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
8.8

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

EPSS
2.05%

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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