CVE-2026-25358

HighRCE

Published: 25 March 2026

Published

25 March 2026

Modified

24 April 2026

KEV Added

—

Patch

—

CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0034 26.2th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-25358 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 26.2th 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-2026-25358 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the Meloo WordPress theme developed by rascals, enabling object injection. The issue affects all versions of Meloo from n/a through those prior to 2.8.2. Published on 2026-03-25, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant confidentiality, integrity, and availability impacts.

Attackers with low privileges, such as authenticated users, can exploit this vulnerability remotely with low complexity and no user interaction required. Successful exploitation allows object injection via deserialization of untrusted data, potentially leading to arbitrary code execution, data manipulation, or system compromise on the targeted WordPress site.

Patchstack advisories recommend updating the Meloo theme to version 2.8.2 or later, where the object injection vulnerability has been addressed. No additional mitigations are specified in the provided references.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-15679

Vulnerability details

Deserialization of Untrusted Data vulnerability in rascals Meloo meloo allows Object Injection.This issue affects Meloo: from n/a through < 2.8.2.

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 →

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

CVE describes remote deserialization/RCE in public-facing WordPress theme (authenticated low-priv user, no interaction), directly enabling T1190 exploitation of Internet-facing apps and subsequent arbitrary command execution via Unix shell on the server.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0