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TI-2025-33804 Aliases CVE-2025-53939

Kiteworks Core is vulnerable to Improper Input Validation

Priority LOW 39CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00789 56th percentileScored 2026-11-07
Fix Fixed security-advisories (kiteworks): 9.1.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Accellionsecurity-advisoriesbefore 9.1.09.1.0Patch availableCNA
  • security-advisories VendorAccellion Affected before 9.1.0 Fixed in 9.1.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:*before 9.1.0VulnerableAccellion
  • cpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:* Versions before 9.1.0 Vulnerable ·Accellion

Remediation

  • Fix · CNA security-advisories (kiteworks) Fixed in 9.1.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-53939

References

Patch 1

  • TI-2021-11694 Accellion Kiteworks before 7.4.0 allows an authenticated user to perform SQL Injection via LDAPGroup Search. CVSS 3.1HIGH 8.8
  • TI-2026-65251 Kiteworks Core Authentication Bypass in the Password Reset Workflow CVSS 3.1CRITICAL 9.8
  • TI-2026-65284 Kiteworks Email Protection Gateway Improper Access Control CVSS 3.1CRITICAL 9.4
  • TI-2026-65241 Kiteworks Email Protection Gateway server-side request forgery CVSS 3.1CRITICAL 9.1
  • TI-2026-65242 Kiteworks Email Protection Gateway improper authentication CVSS 3.1CRITICAL 9.1
  • TI-2026-65238 Kiteworks Email Protection Gateway server-side request forgery CVSS 3.1CRITICAL 9.1
See all 81 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences