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GHSA-9r9j-57rf-f6vj

HighCVSS 8.9 / 10
Published Sep 16, 2022·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

Impact

It's possible to store JavaScript in an attachment name, which will be executed by anyone trying to move the corresponding attachment.

For example, an attachment with name ><img src=1 onerror=alert(1)>.jpg will execute the alert.

Patches

This issue has been patched in XWiki 14.4RC1.

Workarounds

It is possible to fix the vulnerability by copying moveStep1.vm to webapp/xwiki/templates/moveStep1.vm and replace

#set($titleToDisplay = $services.localization.render('attachment.move.title', 
  [$attachment.name, $escapetool.xml($doc.plainTitle), $doc.getURL()]))

by

#set($titleToDisplay = $services.localization.render('attachment.move.title', [
  $escapetool.xml($attachment.name), 
  $escapetool.xml($doc.plainTitle), 
  $escapetool.xml($doc.getURL())
]))

See the corresponding patch.

References

  • https://jira.xwiki.org/browse/XWIKI-19667

For more information

If you have any questions or comments about this advisory:

Risk Scores
Base Score
8.9

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. 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 low impact on the availability of the system.

Threat Intelligence
8.1

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

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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High severity
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