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GHSA-fc42-5w56-qw7h

CriticalCVSS 9.9 / 10
Published Apr 20, 2023·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

Impact

It's possible to execute anything with the right of the Scheduler Application sheet page.

To reproduce:

  1. As a user without script or programming rights, edit your user profile with the object editor and add a new object of type XWiki.SchedulerJobClass (search for "Scheduler")
  2. In "Job Script", add the following {{/code}} {{async async="true" cached="false" context="doc.reference"}}{{groovy}}println("Hello " + "from groovy!"){{/groovy} {{/async}}
  3. Click "Save & View"
  4. If the job information isn't already displayed (you should see "Job Name", "Job Description", etc.), append ?sheet=XWiki.SchedulerJobSheet to the URL.

Patches

This has been patched in XWiki 14.10.3 and 15.0 RC1.

Workarounds

While the fix in the scheduler itself is easy, it relies on the code macro source parameter, which was introduced in 14.10.2 so you have to upgrade to benefit from it.

References

https://jira.xwiki.org/browse/XWIKI-20295 https://jira.xwiki.org/browse/XWIKI-20462

For more information

If you have any questions or comments about this advisory:

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 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
76.30%

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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