Is Deserialization affected by CVE-2026-22501?

A critical deserialization vulnerability (CVE-2026-22501, CVSS 9.8) in Mounthood theme versions up to 1.3.2 allows attackers to inject malicious objects, potentially leading to complete system compromise.

CVE-2026-22501

Q: How to fix CVE-2026-22501?

Within 24 hours: Identify all systems running Mounthood <= 1.3.2 and isolate affected instances from production traffic if possible; implement network-level controls to restrict untrusted inbound connections. Within 7 days: Deploy WAF rules to block malicious deserialization payloads; disable Mounthood functionality or upgrade to an unaffected version if available; review access logs for exploitation attempts. Within 30 days: Complete migration to a patched version upon vendor release; conduct forensic analysis of potentially compromised systems; implement enhanced input validation and serialization controls.

CRITICAL

2026-03-05 [email protected]

9.8

CVSS 3.1

CVSS Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 05, 2026 - 06:16 nvd

CRITICAL 9.8

Description

Deserialization of Untrusted Data vulnerability in axiomthemes Mounthood mounthood allows Object Injection.This issue affects Mounthood: from n/a through <= 1.3.2.

Analysis

Deserialization of untrusted data in Mounthood (mounthood) WordPress theme allows PHP Object Injection, potentially enabling remote code execution through POP chains.

Remediation

Within 24 hours: Identify all systems running Mounthood <= 1.3.2 and isolate affected instances from production traffic if possible; implement network-level controls to restrict untrusted inbound connections. Within 7 days: Deploy WAF rules to block malicious deserialization payloads; disable Mounthood functionality or upgrade to an unaffected version if available; review access logs for exploitation attempts. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +49

POC: 0

CVE-2026-22501 vulnerability details – vuln.today

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CVE-2026-22501

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CVE-2026-22501

CVSS Vector

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Remediation

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