CVE intelligence and bounded remediation

CVE-2024-13777 — Digitalzoomstudio Zoomsounds security vulnerability

Critical CVSS 9.8

The ZoomSounds - WordPress Wave Audio Player with Playlist plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.91 via deserialization of untrusted input from the 'margs' parameter. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

Severity
Critical
CVSS
9.8 (3.1)
Published
2025-03-05
CISA KEV
Not currently listed
Ecosystem
php/wordpress
Weaknesses
CWE-502

Affected products

  • digitalzoomstudio / zoomsounds

Matched remediation archetype

Unsafe deserialization and object reconstruction

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Check exposure

  • Inventory serialization formats accepted from requests, queues, caches, files, cookies, and cross-service messages.
  • Trace whether untrusted input can select classes, types, callbacks, constructors, or object hooks during decoding.
  • Identify signing, schema validation, trust-boundary, and compatibility settings for each decoder.

Remediate safely

  • Replace native object deserialization with a data-only format and explicit schema validation.
  • If replacement is not immediate, use a safe decoder with a minimal type allowlist and disable polymorphic or executable hooks.
  • Update the affected library and add inert tests for unknown types, extra fields, malformed nesting, and unsigned data.

Authoritative sources

Complete CVE record and remediation plan

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