CVE-2025-53939

Name: CVE-2025-53939
Creator: NVD / NIST
Published: 2025-11-29T03:15:59.153+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.62%

Last modified Jun 17, 2026

CVE-2025-53939 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Kiteworks is a private data network (PDN). Prior to version 9.1.0, improper input validation when managing roles of a shared folder could lead to unexpectedly elevate another user's permissions on the share. EPSS estimates a 0.62% chance of exploitation in the next 30 days.

Description

Kiteworks is a private data network (PDN). Prior to version 9.1.0, improper input validation when managing roles of a shared folder could lead to unexpectedly elevate another user's permissions on the share. This issue has been patched in version 9.1.0.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.62%

45.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Accellion	Kiteworks	< 9.1.0

References

https://github.com/kiteworks/security-advisories/security/advisories/GHSA-hpf5-6376-2565Patch, Third Party Advisory

Timeline

Published: Nov 29, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-53939?

How severe is CVE-2025-53939?

CVE-2025-53939 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.

How do I fix CVE-2025-53939?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-53939?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST