Security readout for executives and security teams
Plain-English summary
CVE-2026-27367 is a reflected cross-site scripting issue in the ThemeGoods Musico WordPress theme before version 3.4.5. An attacker could trick a user into opening a crafted link, causing script to run in that user’s browser. This can affect site trust and user sessions, but it requires user interaction.
Executive priority
Prioritize remediation for public-facing WordPress sites using Musico, especially sites with editors or administrators likely to click external links. This is high severity but not confirmed actively exploited in the provided sources.
Technical view
The issue is CWE-79 improper neutralization during web page generation in Musico. CVSS 3.1 is 7.1 high: network-accessible, low complexity, no privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impacts. The CVE record states Musico versions below 3.4.5 are affected.
Likely exposure
Exposure is limited to WordPress sites using the ThemeGoods Musico theme below 3.4.5. Sites not using this theme are not affected based on the provided sources. Confirm theme presence and version in WordPress asset inventory.
Exploitation context
The provided sources describe reflected XSS, which typically depends on a victim visiting attacker-controlled content. The CVE is not listed as KEV in the source bundle, and no cited source here confirms active exploitation.
Researcher notes
There is a version discrepancy in the bundle: the description says affected through below 3.4.5, while the Patchstack reference title mentions 3.2.4. Treat below 3.4.5 as the primary affected range from the CVE description unless vendor guidance says otherwise.
Mitigation direction
- Upgrade ThemeGoods Musico to version 3.4.5 or later if available from the vendor.
- If upgrade status is unclear, check ThemeGoods and Patchstack guidance before making changes.
- Limit administrative browsing from authenticated WordPress sessions until patched.
- Review web application firewall rules for XSS protections as a temporary control.
Validation and detection
- Identify all WordPress sites using the Musico theme.
- Confirm the installed Musico version is 3.4.5 or later.
- Check vulnerability management tools for CVE-2026-27367 detection coverage.
- Review access logs for suspicious requests to Musico-related pages or parameters.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2026-27367 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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:N/UI:R/S:C/C:L/I:L/A:L2.83.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.