Security readout for executives and security teams
Plain-English summary
CVE-2026-27990 affects the ThemeREX ConFix WordPress theme through version 1.013. It is a high-severity local file inclusion issue that could let an attacker access or manipulate sensitive server-side files. Business urgency is highest for public WordPress sites running this theme.
Executive priority
Treat as a high-priority WordPress exposure if ConFix is present. Confirm usage quickly, then update, replace, or disable according to vendor guidance. Sites not using this theme are not indicated as affected by the provided sources.
Technical view
The issue is improper control of a filename used in PHP include/require logic, mapped to CWE-98. The CVSS 3.1 score is 8.1 with network attack vector, no privileges, no user interaction, high complexity, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress installations using the ThemeREX ConFix theme, especially versions up to and including 1.013. The source bundle does not confirm a fixed version or affected CPEs, so asset validation is required.
Exploitation context
The CVE is not listed as CISA KEV in the provided data, and no cited source states active exploitation. The CVSS vector indicates remote, unauthenticated exploitation may be possible, but attack complexity is high.
Researcher notes
Public evidence is limited to CVE metadata and Patchstack’s advisory entry. The description calls this local file inclusion, while CWE-98 is commonly associated with PHP file inclusion controls. No exploit, patch version, or active exploitation evidence is included in the provided sources.
Mitigation direction
- Inventory WordPress sites for the ThemeREX ConFix theme.
- Identify whether installed ConFix versions are 1.013 or older.
- Check ThemeREX and Patchstack guidance for an official fix.
- Apply any vendor-provided update when available.
- If no fix exists, evaluate disabling or replacing the theme.
- Prioritize externally exposed production WordPress sites first.
Validation and detection
- Confirm whether ConFix is active or installed on each WordPress site.
- Record the installed ConFix version from trusted administrative sources.
- Review Patchstack and CVE records for updated remediation details.
- Use authenticated WordPress vulnerability scanning where available.
- Review web logs for unusual requests targeting theme files.
- Document remediation status for each affected site.
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-2026-27990 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.