Security readout for executives and security teams
Plain-English summary
A critical flaw in the WordPress ThemeMakers Visual Content Composer plugin can let an unauthenticated attacker trigger unsafe PHP object deserialization. In business terms, exposed WordPress sites using versions up to 1.5.8 may face full site compromise risk. The provided sources do not confirm active exploitation or a fixed version.
Executive priority
Prioritize same-day triage for public WordPress sites. If the plugin is present at an affected version, removal or verified remediation should be treated as critical because the stated impact includes confidentiality, integrity, and availability loss.
Technical view
CVE-2025-53299 is CWE-502 deserialization of untrusted data in ThemeMakers Visual Content Composer package tmm_content_composer through version 1.5.8. CVSS 3.1 is 9.8 with network access, low complexity, no privileges, and no user interaction. Source details do not include vulnerable endpoint, proof of concept, or confirmed patch.
Likely exposure
Exposure is likely limited to WordPress sites with ThemeMakers Visual Content Composer installed, especially versions <= 1.5.8. The bundle lists default status as unaffected outside the named affected product and version range. Confirm plugin presence directly; do not infer exposure from WordPress use alone.
Exploitation context
The CVSS vector supports unauthenticated remote exploitability in principle, but the bundle does not provide exploit mechanics. KEV is false, and no cited source in the bundle states active exploitation. Treat as urgent because object injection can become severe when exploitable gadget chains exist.
Researcher notes
The source bundle is strong on affected product, weakness class, and CVSS, but sparse on exploit details and remediation. Validate exposure without relying on exploit reproduction. PHP object injection impact may depend on reachable code paths and available gadget chains in the target environment.
Mitigation direction
- Inventory WordPress sites for ThemeMakers Visual Content Composer.
- Disable or remove affected versions if business impact allows.
- Check Patchstack and vendor guidance for a fixed version.
- Update only to a confirmed safe release when available.
- Increase monitoring for unusual WordPress request patterns.
Validation and detection
- Confirm whether tmm_content_composer is installed on each WordPress site.
- Record the installed plugin version and compare against <= 1.5.8.
- Check asset inventories for externally reachable WordPress instances.
- Review security logs for suspicious requests targeting WordPress plugin paths.
- Document compensating controls if immediate removal is not possible.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-53299 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.