How severe is CVE-2025-29509?

CVE-2025-29509 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-29509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-29509?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-29509 have an EU (EUVD) identifier?

Yes. CVE-2025-29509 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14181.

When was CVE-2025-29509 published?

CVE-2025-29509 was published on 2025-05-09 and last updated on 2026-06-17.

CVE-2025-29509

CVE-2025-29509 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-14181
Weakness: CWE-77
Published: 2025-05-09
Last modified: 2026-06-17

Description

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().

Frequently asked questions

What is CVE-2025-29509?: 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().
How severe is CVE-2025-29509?: CVE-2025-29509 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-29509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-29509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-29509 have an EU (EUVD) identifier?: Yes. CVE-2025-29509 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14181.
When was CVE-2025-29509 published?: CVE-2025-29509 was published on 2025-05-09 and last updated on 2026-06-17.

References

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