Security readout for executives and security teams
Plain-English summary
CVE-2026-28074 is a critical WordPress theme vulnerability in ThemeREX Pizza House through version 1.4.0. It involves unsafe handling of serialized data, which can let an unauthenticated remote attacker inject PHP objects. The public sources rate potential impact as complete confidentiality, integrity, and availability compromise.
Executive priority
Treat this as urgent for any internet-facing WordPress site using Pizza House. The vulnerability is rated critical and requires no authentication according to the CVSS vector. Business priority should be rapid exposure identification, removal or update planning, and compromise review for affected sites.
Technical view
The issue is CWE-502 deserialization of untrusted data in the pizzahouse WordPress theme. CVSS 3.1 is 9.8: network exploitable, low complexity, no privileges, no user interaction, unchanged scope, and high CIA impact. Sources do not describe the vulnerable endpoint, proof-of-concept details, or a confirmed fixed version.
Likely exposure
Exposure is limited to WordPress sites using the ThemeREX Pizza House theme at version 1.4.0 or earlier. The source bundle lists the product package as pizzahouse. Sites not using this theme are not indicated as affected by the provided sources.
Exploitation context
The CVE is not listed as KEV in the provided data, and no cited source confirms active exploitation. The CVSS vector indicates remote unauthenticated exploitation may be possible. Public details are sparse, so defenders should prioritize inventory and vendor guidance rather than assume exploit availability.
Researcher notes
Evidence confirms CWE-502 object injection and affected versions through 1.4.0. The sources do not provide endpoint, patch version, exploit status, or technical root-cause details. The affected version metadata in the bundle is sparse, so validate against the CVE description and Patchstack entry.
Mitigation direction
- Identify all WordPress sites using the Pizza House theme.
- Check whether the installed theme version is 1.4.0 or earlier.
- Consult ThemeREX or Patchstack guidance for an updated or remediated release.
- If no fix is available, remove, disable, or replace the theme.
- Back up affected sites before making production changes.
Validation and detection
- Confirm the theme slug or package name is pizzahouse.
- Record installed Pizza House theme versions across WordPress environments.
- Verify no site remains on Pizza House version 1.4.0 or earlier.
- Review recent site integrity, admin users, and unexpected file changes.
- Monitor vendor, CVE, and Patchstack pages for updated remediation details.
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-2026-28074 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.