Security readout for executives and security teams
Plain-English summary
CVE-2026-28138 affects the Stylemix uListing WordPress plugin through version 2.2.0. It is a PHP object injection issue caused by unsafe deserialization. The published CVSS score is 7.2, high. Sources do not state active exploitation, and CISA KEV status is false.
Executive priority
Treat as high priority for WordPress properties using uListing, especially public-facing business sites. Prioritize inventory and remediation planning, but avoid assuming internet-scale exploitation because sources indicate high privileges are required and do not report active exploitation.
Technical view
The vulnerability is CWE-502, deserialization of untrusted data, in uListing <= 2.2.0. CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, indicating network reachability but requiring high privileges. Impact can include confidentiality, integrity, and availability loss if exploitable object chains exist.
Likely exposure
Exposure is limited to WordPress sites running the Stylemix uListing plugin at version 2.2.0 or earlier. The CVSS vector indicates an attacker needs high privileges, so compromised administrator-level accounts or malicious privileged users are the main concern.
Exploitation context
No provided source reports active exploitation, and the CVE is not listed as KEV. Object injection vulnerabilities can become serious when reachable deserialization paths combine with usable PHP gadget chains. The public data does not identify a patch version or detailed exploitation path.
Researcher notes
Focus review on unsafe unserialize or equivalent deserialization paths in uListing <= 2.2.0. Validate reachability under high-privilege roles. Assess impact cautiously because practical severity may depend on available object chains and installed WordPress/PHP components.
Mitigation direction
- Inventory WordPress sites for the Stylemix uListing plugin.
- Identify installations running uListing version 2.2.0 or earlier.
- Check Patchstack and vendor guidance for fixed versions or official mitigations.
- Update if an official fixed release is available.
- Disable or remove the plugin where business use is not required.
- Restrict and monitor high-privilege WordPress accounts.
Validation and detection
- Confirm plugin presence and version on each WordPress site.
- Verify whether uListing is active or merely installed.
- Review vendor or Patchstack advisories for remediation status.
- Check for unexpected high-privilege WordPress account activity.
- Document any sites temporarily retaining affected versions.
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-2026-28138 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
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/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.