Jan up to 0.5.14 Conversation shell.openExternal code injection

Summaryinfo

A vulnerability was found in Jan up to 0.5.14. It has been rated as critical. This vulnerability affects the function shell.openExternal of the component Conversation Handler. This manipulation causes Remote Privilege Escalation. This vulnerability is registered as CVE-2025-29509. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Jan up to 0.5.14 and classified as critical. Affected by this vulnerability is the function shell.openExternal of the component Conversation Handler. The manipulation with an unknown input leads to a remote privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Jan v0.5.14 and before is vulnerable to remote code execution (RCE) when the user clicks on a rendered link in the conversation, due to opening external website in the app and the exposure of electronAPI, with a lack of filtering of URL when calling shell.openExternal().

The advisory is shared at gist.github.com. This vulnerability is known as CVE-2025-29509 since 03/11/2025. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/26/2025). MITRE ATT&CK project uses the attack technique T1059 for this issue.

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 vulnerability database at EUVD (EUVD-2025-14181). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• Jan

Version

• 0.5.0
• 0.5.1
• 0.5.2
• 0.5.3
• 0.5.4
• 0.5.5
• 0.5.6
• 0.5.7
• 0.5.8
• 0.5.9
• 0.5.10
• 0.5.11
• 0.5.12
• 0.5.13
• 0.5.14

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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