Security readout for executives and security teams
Plain-English summary
CVE-2026-22421 affects the WordPress Quantum theme by AncoraThemes through version 1.0. It is a high-severity local file inclusion issue that could let an unauthenticated remote attacker access or influence server-side files. The public sources do not state that exploitation is active or that a fixed version is available.
Executive priority
Treat this as a high-priority WordPress exposure if Quantum is deployed. The urgency depends on whether the theme exists in your environment. Start with inventory, then remediate or remove affected installations once vendor guidance is confirmed.
Technical view
The issue is classified as CWE-98: improper control of a filename used in a PHP include/require statement. CVSS 3.1 is 8.1 with network attack vector, no privileges, no user interaction, high complexity, and high confidentiality, integrity, and availability impact. Scope is unchanged.
Likely exposure
Exposure is limited to WordPress sites using the AncoraThemes Quantum theme at version 1.0 or earlier. Organizations should verify theme inventory across production, staging, backups, and managed WordPress environments.
Exploitation context
The CVE record and Patchstack entry describe the vulnerability but do not provide public evidence of active exploitation. It is not listed as CISA KEV in the provided bundle. Attack complexity is rated high, but no authentication or user interaction is required.
Researcher notes
Public detail is limited. The available data identifies LFI in Quantum through 1.0, CVSS 8.1, CWE-98, and no KEV listing. No exploit, patch version, vulnerable parameter, or code-level detail is included in the provided sources.
Mitigation direction
- Identify all WordPress sites using the Quantum theme.
- Check AncoraThemes and Patchstack for vendor remediation guidance.
- Update the theme if a fixed release is available from the vendor.
- If no fix is available, remove or disable the theme where feasible.
- Apply least-privilege file permissions to WordPress and hosting directories.
Validation and detection
- Confirm installed Quantum theme versions across WordPress instances.
- Review asset inventory for inactive but installed Quantum theme copies.
- Check security advisories for any newly published fixed version.
- Review web logs for unusual requests targeting theme files.
- Document business owners for affected WordPress sites.
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-98: 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 lookupCVE-2026-22421 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
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/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:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/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.
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.