CVE-2025-49438

HighRCE

Published: 20 August 2025

Published

20 August 2025

Modified

28 April 2026

KEV Added

—

Patch

—

CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0011 29.6th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-49438 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 29.6th percentile by exploit likelihood (below the median); 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-2025-49438 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the Simple Login Log WordPress plugin developed by Max Chirkov. The flaw enables Object Injection and affects all versions of the plugin from n/a through 1.1.3.

The vulnerability carries a CVSS v3.1 base score of 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating a high-severity issue exploitable over the network by unauthenticated attackers. Exploitation requires high attack complexity and no user interaction, but successful attacks can result in high impacts to confidentiality, integrity, and availability.

Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/simple-login-log/vulnerability/wordpress-simple-login-log-plugin-1-1-3-php-object-injection-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-25356

Vulnerability details

Deserialization of Untrusted Data vulnerability in Max Chirkov Simple Login Log allows Object Injection. This issue affects Simple Login Log: from n/a through 1.1.3.

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?

PHP object injection via untrusted deserialization in a public-facing WordPress plugin directly enables remote exploitation of a web application by unauthenticated attackers, mapping to T1190.

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