GNOME Yelp Help Document inclusion of functionality from untrusted control sphere

Summaryinfo

A vulnerability identified as problematic has been detected in GNOME Yelp. This affects an unknown function of the component Help Document Handler. The manipulation leads to inclusion of functionality from untrusted control sphere. This vulnerability is traded as CVE-2025-3155. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in GNOME Yelp (affected version not known) and classified as problematic. This issue affects some unknown functionality of the component Help Document Handler. The manipulation with an unknown input leads to a inclusion of functionality from untrusted control sphere vulnerability. Using CWE to declare the problem leads to CWE-829. The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. Impacted is confidentiality. The summary by CVE is:

A flaw was found in Yelp. The Gnome user help application allows the help document to execute arbitrary scripts. This vulnerability allows malicious users to input help documents, which may exfiltrate user files to an external environment.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2025-3155 since 04/03/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/29/2025).

The vulnerability scanner Nessus provides a plugin with the ID 235130 (RHEL 8 : yelp (RHSA-2025:4455)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (235130) and EUVD (EUVD-2025-9635). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• GNOME

Name

• Yelp

License

• open-source

Website

• Vendor: https://www.gnome.org/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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