Meloo < 2.8.2 - Authenticated (Subscriber+) PHP Object Injection
Strategic Overview
- Status
- Patched in 2.8.2
- Affected Theme
- Meloo - Music Theme for WordPress
- Affected Version
< 2.8.2- CVSS
- 7.5High
- Weakness type
- CWE-502 · Deserialization of Untrusted Data
- CVE
CVE-2026-25358
At a glance
CVE-2026-25358 is a high-severity Deserialization of Untrusted Data vulnerability in the Meloo - Music Theme for WordPress WordPress theme, affecting versions < 2.8.2. It carries a CVSS score of 7.5 (reachable over the network; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 2.8.2; sites on affected versions should update now. Disclosed March 2026, reported by Tran Nguyen Bao Khanh.
Vulnerability Overview
The Meloo theme for WordPress is vulnerable to PHP Object Injection in versions up to 2.8.2 via deserialization of untrusted input. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-502: Deserialization of Untrusted Data
Reaching this weakness in Meloo - Music Theme for WordPress < 2.8.2 takes an account at Subscriber level or above. Deserialization of untrusted data means the application reconstructs objects from input a caller controls, letting the attacker choose which classes get instantiated and what their properties hold.
A workable chain turns deserialization into file writes, deletions or code execution, depending on what the loaded classes do in their magic methods. For Meloo - Music Theme for WordPress the fix is 2.8.2: builds < 2.8.2 are affected, anything from 2.8.2 onward is not.
Remediation
Update to version 2.8.2, or a newer patched version
How does WordSec protect against this?
An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Meloo - Music Theme for WordPress 2.8.2 closes this, and updating the theme is the step that ends it.
- Firewall
- Scanner
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C