What is the CVSS score of CVE-2025-68853?

CVE-2025-68853 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Kleor Contact Manager are affected by CVE-2025-68853?

A critical deserialization vulnerability in Kleor Contact Manager (versions through 9.1.1) allows attackers to inject malicious objects, potentially leading to unauthorized access, data theft, or…

How to fix or mitigate CVE-2025-68853?

Within 24 hours: Identify all systems running Contact Manager versions ≤9.1.1 and isolate them from untrusted networks; disable remote access if possible. Within 7 days: Implement network segmentation to restrict Contact Manager traffic and apply WAF rules to block serialized object patterns; monitor for exploitation attempts. Within 30 days: Develop a migration plan to upgrade to patched versions once available; evaluate alternative contact management solutions if vendor remediation timeline is unclear.

Kleor Contact Manager CVE-2025-68853

HIGH

Deserialization of Untrusted Data (CWE-502)

2026-02-20 audit@patchstack.com

Deserialization

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 23, 2026 - 15:43 vuln.today

cvss_changed

Analysis Generated

Mar 12, 2026 - 22:04 vuln.today

CVE Published

Feb 20, 2026 - 16:22 nvd

HIGH 8.8

DescriptionCVE.org

Deserialization of Untrusted Data vulnerability in Kleor Contact Manager contact-manager allows Object Injection.This issue affects Contact Manager: from n/a through <= 9.1.1.

AnalysisAI

Deserialization of Untrusted Data vulnerability in Kleor Contact Manager contact-manager allows Object Injection.This issue affects Contact Manager: from n/a through <= 9.1.1. [CVSS 8.8 HIGH]

Technical ContextAI

Classified as CWE-502 (Deserialization of Untrusted Data). Affects Kleor Contact Manager contact-manager. Deserialization of Untrusted Data vulnerability in Kleor Contact Manager contact-manager allows Object Injection.This issue affects Contact Manager: from n/a through <= 9.1.1.

Affected ProductsAI

Product: Kleor Contact Manager contact-manager.

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

CVE-2025-68853 vulnerability details – vuln.today

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Kleor Contact Manager CVE-2025-68853

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

Affected ProductsAI

RemediationAI

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External POC / Exploit Code