What is the CVSS score of CVE-2026-22453?

CVE-2026-22453 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of ThemeREX Pets Club are affected by CVE-2026-22453?

A critical remote code execution vulnerability exists in ThemeREX Pets Club plugin (versions ≤ 2.3) that could allow attackers to inject malicious objects and execute arbitrary code on affected…

How to fix or mitigate CVE-2026-22453?

Within 24 hours: Identify all systems running Pets Club plugin and assess business criticality. Within 7 days: Implement network segmentation to isolate affected systems, deploy WAF rules blocking deserialization requests to the plugin, and disable the Pets Club plugin if not business-critical. Within 30 days: Migrate to alternative solutions, monitor vendor for patch release, and conduct security assessment of compromised systems.

ThemeREX Pets Club CVE-2026-22453

CRITICAL

Deserialization of Untrusted Data (CWE-502)

2026-03-05 audit@patchstack.com

Deserialization

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/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: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

Re-analysis Queued

Apr 22, 2026 - 21:37 vuln.today

cvss_changed

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 05, 2026 - 06:16 nvd

CRITICAL 9.8

DescriptionCVE.org

Deserialization of Untrusted Data vulnerability in ThemeREX Pets Club petclub allows Object Injection.This issue affects Pets Club: from n/a through <= 2.3.

AnalysisAI

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

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send malicious serialized object to plugin endpoint

Exploit

Plugin deserializes untrusted data

Execution

Instantiate arbitrary PHP object

Impact

Execute remote code with WordPress privileges

Access

Send malicious serialized object to plugin endpoint

Exploit

Plugin deserializes untrusted data

Execution

Instantiate arbitrary PHP object

Impact

Execute remote code with WordPress privileges

Vulnerability AssessmentAI

Exploitation	ThemeREX Pets Club plugin version 2.3 or earlier installed and activated on WordPress. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 9.8. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	Attacker submits serialized PHP payload through petclub theme, triggering Object Injection that chains to file write or code execution via available POP gadgets.
Remediation	Update the theme. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all systems running Pets Club plugin and assess business criticality. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-22453 vulnerability details – vuln.today

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ThemeREX Pets Club CVE-2026-22453

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Unlock full vulnerability intelligence

Attack ChainAIDerived

Vulnerability AssessmentAI

Recommended ActionAI

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External POC / Exploit Code