Security readout for executives and security teams
Plain-English summary
CVE-2026-22400 is a medium-severity access-control flaw in the WordPress Holmes theme. Sites running Holmes version 1.7 or earlier may allow logged-in users to affect objects they should not control. Public sources do not indicate active exploitation or a named vendor patch.
Executive priority
Treat as a routine but time-bound WordPress remediation item. Prioritize internet-facing sites with many contributors, customers, or subscribers. No public source here supports emergency response for active exploitation.
Technical view
The issue is an Insecure Direct Object Reference mapped to CWE-639 in Mikado-Themes Holmes. CVSS 3.1 is 5.4: network reachable, low complexity, privileges required, no user interaction, with low integrity and availability impact and no confidentiality impact.
Likely exposure
Exposure is likely limited to WordPress installations using the Holmes theme through version 1.7, especially where untrusted or low-privileged users can log in. The provided metadata is sparse and has some version-field inconsistency, so asset validation is important.
Exploitation context
Sources describe an authorization bypass through a user-controlled key. Exploitation requires some level of authenticated access. There is no KEV listing and no provided source claims active exploitation.
Researcher notes
The CVE description and Patchstack reference identify Holmes <=1.7 as affected. The bundled affected-version field is inconsistent, listing version “0” while defaulting to unaffected. Do not rely on CPE matching alone; verify theme name and version directly.
Mitigation direction
- Identify WordPress sites using the Holmes theme.
- Check whether Holmes is version 1.7 or earlier.
- Review Mikado-Themes and Patchstack guidance for fixed versions or workarounds.
- If no supported fix exists, consider disabling or replacing the theme.
- Restrict or remove unnecessary low-privileged WordPress accounts.
Validation and detection
- Inventory active and installed WordPress themes across managed sites.
- Confirm Holmes theme version from administrative or asset records.
- Review user roles with login access to affected sites.
- Monitor logs for unusual object modification attempts by low-privileged users.
- Track CVE and Patchstack entries 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-639: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-22400 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
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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:N/I:L/A:L2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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.
Authorization Bypass Through User-Controlled Key
Authorization Bypass Through User-Controlled Key represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.