Security readout for executives and security teams
Plain-English summary
CVE-2026-27439 is a critical vulnerability in the WordPress Dentario theme up to version 1.5. It involves unsafe deserialization, which can let an unauthenticated remote attacker trigger PHP object injection. The CVSS score is 9.8, indicating potential full compromise of confidentiality, integrity, and availability if exploitable in a deployed site.
Executive priority
Treat this as urgent for any public WordPress site using Dentario. The vulnerability is critical and unauthenticated, but public sources provided do not confirm active exploitation or a named patch. Leadership should require rapid inventory, vendor guidance review, and removal or replacement where safe remediation is unavailable.
Technical view
The issue is CWE-502, Deserialization of Untrusted Data, in ThemeREX Dentario. The CVE states Dentario versions through 1.5 are affected. The CVSS vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Public sources provided do not name a fixed version, mitigation, vulnerable endpoint, or proof-of-concept details.
Likely exposure
Exposure is most likely on WordPress sites using the ThemeREX Dentario theme version 1.5 or earlier. The CVSS vector indicates network-reachable, unauthenticated exploitation without user interaction. Sites not using Dentario, or confirmed above the affected range, are not indicated as affected by the provided sources.
Exploitation context
No active exploitation is stated in the provided sources, and the CVE is not listed as KEV in the source bundle. The risk remains high because the vulnerability is unauthenticated, low-complexity, and scored for high confidentiality, integrity, and availability impact.
Researcher notes
The public record identifies the vulnerability class and severity but lacks endpoint, gadget-chain, exploitability, and fixed-version detail. Avoid assuming remote code execution beyond the scored impact. Validate exposure through theme presence and version, then monitor Patchstack, CVE, and vendor channels for remediation details.
Mitigation direction
- Inventory WordPress sites for the Dentario theme and installed version.
- Prioritize sites running Dentario version 1.5 or earlier.
- Check ThemeREX and Patchstack guidance for a fixed version or official mitigation.
- If no safe update exists, consider disabling or replacing the theme.
- Back up affected sites before making theme changes.
Validation and detection
- Confirm whether the Dentario theme is installed on each WordPress site.
- Record the Dentario version and compare it to the affected range.
- Review vendor or Patchstack pages for updated remediation guidance.
- Check web and application logs for unusual unauthenticated requests.
- Document remediation status for each affected WordPress instance.
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-2026-27439 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.