Cyber Resilience

CVE-2025-30973

CriticalRCE

Published: 16 July 2025

Published
16 July 2025
Modified
23 April 2026
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0037 59.2th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-30973 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 40.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2025-30973 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the CoSchool LMS WordPress plugin developed by Codexpert, Inc., enabling Object Injection. The issue affects CoSchool LMS versions from n/a through 1.4.3.

The vulnerability carries a CVSS v3.1 base score of 9.8 (Critical), with attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and unchanged scope (S:U), resulting in high impacts to confidentiality (C:H), integrity (I:H), and availability (A:H). Remote unauthenticated attackers can exploit it to perform object injection via untrusted data deserialization.

Patchstack's advisory (https://patchstack.com/database/Wordpress/Plugin/coschool/vulnerability/wordpress-coschool-lms-1-4-3-php-object-injection-vulnerability?_s_id=cve) documents the PHP Object Injection vulnerability in CoSchool LMS version 1.4.3.

EU & UK References

Vulnerability details

Deserialization of Untrusted Data vulnerability in Codexpert, Inc CoSchool LMS coschool allows Object Injection.This issue affects CoSchool LMS: from n/a through <= 1.4.3.

CWE(s)
CWE-502

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Direct remote unauthenticated exploitation of a public-facing WordPress plugin via deserialization/object injection.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2024-13770Shared CWE-502
CVE-2026-27303Shared CWE-502
CVE-2025-53586Shared CWE-502
CVE-2025-64353Shared CWE-502
CVE-2025-31047Shared CWE-502
CVE-2026-27096Shared CWE-502
CVE-2023-49886Shared CWE-502
CVE-2026-23542Shared CWE-502
CVE-2025-66631Shared CWE-502
CVE-2026-40044Shared CWE-502

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly mitigates CVE-2025-30973 by identifying, reporting, and correcting the deserialization of untrusted data flaw in CoSchool LMS versions through 1.4.3.

SI-10 Information Input Validation good match
prevent

Prevents object injection in the CoSchool LMS WordPress plugin by validating the validity, structure, and content of untrusted input data prior to deserialization.

SI-9 Information Input Restrictions good match
prevent

Enforces restrictions on untrusted serialized data inputs to the CoSchool LMS plugin based on type and source, blocking exploitation of the deserialization vulnerability.

References