Cyber Resilience

CVE-2026-22510

HighRCE

Published: 25 March 2026

Published
25 March 2026
Modified
24 April 2026
KEV Added
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Patch
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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 0.0040 31.2th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-22510 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 31.2th 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-2026-22510 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the AncoraThemes Melody (melodyschool) WordPress theme that allows Object Injection. Published on 2026-03-25, this issue affects Melody theme versions from n/a through <=1.6.3.

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). Unauthenticated remote attackers can exploit it over the network, though it requires high attack complexity and no user interaction. Successful exploitation enables object injection, resulting in high impacts to confidentiality, integrity, and availability.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/melodyschool/vulnerability/wordpress-melody-theme-1-6-3-php-object-injection-vulnerability?_s_id=cve details this PHP Object Injection vulnerability in the WordPress Melody theme version 1.6.3.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability details

Deserialization of Untrusted Data vulnerability in AncoraThemes Melody melodyschool allows Object Injection.This issue affects Melody: from n/a through <= 1.6.3.

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 theme via PHP object injection/deserialization matches T1190 exactly.

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

CVEs Like This One

CVE-2025-62368Shared CWE-502
CVE-2025-68903Shared CWE-502
CVE-2025-67911Shared CWE-502
CVE-2025-54014Shared CWE-502
CVE-2026-22505Shared CWE-502
CVE-2025-53078Shared CWE-502
CVE-2026-43633Shared CWE-502
CVE-2025-60039Shared CWE-502
CVE-2026-25429Shared CWE-502
CVE-2025-7697Shared CWE-502

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly remediates the deserialization of untrusted data flaw in the vulnerable Melody WordPress theme by identifying, patching, and deploying fixes.

SI-10 Information Input Validation good match
prevent

Prevents object injection by enforcing validation and sanitization of untrusted input data before deserialization processing in the theme.

RA-5 Vulnerability Monitoring and Scanning partial match
detect

Detects the PHP object injection vulnerability through vulnerability scanning of WordPress themes and components.

References