Security readout for executives and security teams
Plain-English summary
CVE-2026-25400 affects the WordPress Apicona theme through version 24.1.0. It is a PHP object injection issue caused by unsafe deserialization. If exploited by a logged-in attacker, it could allow serious compromise of the site’s data, integrity, or availability.
Executive priority
Treat as high priority for WordPress sites using Apicona, especially public sites with user accounts. The issue has severe potential impact, but the supplied sources do not confirm active exploitation or name a fixed version.
Technical view
The vulnerability is CWE-502 deserialization of untrusted data in thememount Apicona. CVSS 3.1 is 8.8, vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The source bundle identifies affected Apicona versions through 24.1.0. No exploit details or confirmed fixed version are provided in the supplied sources.
Likely exposure
Exposure is limited to WordPress installations using the Apicona theme at version 24.1.0 or earlier. Sites without this theme are not indicated as affected by the supplied sources.
Exploitation context
The CVSS vector indicates exploitation is network-reachable, low complexity, requires low privileges, and needs no user interaction. CISA KEV status is false in the bundle, and no cited source confirms active exploitation.
Researcher notes
Focus validation on affected theme presence, version, and vendor remediation status. The key technical issue is unsafe PHP object deserialization. Impact may depend on reachable code paths and available object chains, which are not detailed in the provided sources.
Mitigation direction
- Inventory WordPress sites for the Apicona theme and record installed versions.
- Prioritize sites running Apicona version 24.1.0 or earlier.
- Check ThemeMount, Patchstack, or WordPress theme distribution guidance for a fixed release.
- Update the theme when a vendor-supported fixed version is available.
- If no fix is available, consider disabling or replacing the theme based on business risk.
Validation and detection
- Confirm whether Apicona is installed on each WordPress instance.
- Verify the installed Apicona version is greater than 24.1.0 or otherwise vendor-confirmed safe.
- Review vendor and Patchstack advisories for remediation updates.
- Assess whether low-privileged accounts exist on exposed affected sites.
- Monitor affected sites for unusual authenticated activity or unexpected theme-related errors.
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-2026-25400 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/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.