CVE-2024-26138 License information is public, exposing instance id and license holder details

What is CVE-2024-26138?

CVE-2024-26138 is a medium-severity vulnerability in xwikisas application-licensing, published on 21 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The XWiki licensor application, which manages and enforce application licenses for paid extensions, includes the document `Licenses.Code.LicenseJSON` that provides information for admins regarding active licenses. This document is public and thus exposes this information publicly. The information includes the instance's id as well as first and last name and email of the license owner. This is a leak of information that isn't supposed to be public. The instance id allows associating data on the active installs data with the concrete XWiki instance. Active installs assures that "there's no way to find who's having a given UUID" (referring to the instance id). Further, the information who the license owner is and information about the obtained licenses can be used for targeted phishing attacks. Also, while user information is normally public, email addresses might only be displayed obfuscated, depending on the configuration. This has been fixed in Application Licensing 1.24.2. There are no known workarounds besides upgrading.

Weakness: CWE-862

Which versions are affected by CVE-2024-26138?

2 open source packages ship an affected version, including com.xwiki.licensing:application-licensing-licensor-ui. It affects 1 product.

Products include Xwiki Application Licensing.

How do I fix CVE-2024-26138?

Upgrade com.xwiki.licensing:application-licensing-licensor-ui to 1.24.2 or later.

Is CVE-2024-26138 being exploited?

There is no known exploitation of CVE-2024-26138 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4hfp-m9gv-m753.