Security readout for executives and security teams
Plain-English summary
CVE-2026-22453 is a critical vulnerability in the WordPress Pets Club theme by ThemeREX, affecting versions up to 2.3. A remote unauthenticated attacker could potentially abuse unsafe PHP deserialization to compromise confidentiality, integrity, and availability. No cited source confirms active exploitation.
Executive priority
Treat this as urgent for any public WordPress site using Pets Club through version 2.3. The severity is critical, but urgency should be tied to confirmed asset exposure because no active exploitation is cited in the provided sources.
Technical view
The issue is CWE-502, deserialization of untrusted data, leading to PHP object injection in the petclub WordPress theme. The CVSS 3.1 score is 9.8 with network attack vector, low complexity, no privileges, and no user interaction required. Public data identifies affected Pets Club versions through 2.3.
Likely exposure
Organizations are exposed if they run the ThemeREX Pets Club WordPress theme at version 2.3 or earlier. Exposure is higher for internet-facing WordPress sites. The source bundle does not identify affected plugins, other themes, or specific hosting configurations.
Exploitation context
The CVSS vector indicates remote, unauthenticated exploitation may be possible without user interaction. However, the provided sources do not include exploit availability, proof-of-concept details, or confirmed exploitation. The CVE is not listed as KEV in the provided bundle.
Researcher notes
Evidence is limited to the CVE metadata and Patchstack vulnerability entry. The root cause is unsafe deserialization, but no sink, gadget chain, exploit conditions, patch version, or workaround details are included in the supplied sources.
Mitigation direction
- Inventory WordPress sites using the Pets Club theme.
- Identify any Pets Club installations at version 2.3 or earlier.
- Check ThemeREX and Patchstack guidance for updates or vendor remediation.
- If no fix is available, consider disabling or replacing the theme.
- Restrict administrative access and monitor WordPress logs for suspicious activity.
Validation and detection
- Confirm whether the Pets Club theme is installed.
- Record the installed Pets Club theme version.
- Compare the installed version against the affected range through 2.3.
- Review vendor or Patchstack advisories for remediation status.
- Check monitoring for unexpected WordPress errors or unauthorized changes.
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-2026-22453 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.