Security readout for executives and security teams
Plain-English summary
CVE-2026-4389 affects a WordPress plugin used with Leaflet maps. An authenticated user with Contributor-level access or higher could save malicious script through specific shortcode attributes. That script can run when others view the affected page. This is mainly a risk for sites allowing multiple content authors or less-trusted contributor accounts.
Executive priority
Treat as a moderate-priority web content security issue. Prioritize public WordPress sites with many content contributors, external authors, or weak account governance. It is less urgent than unauthenticated remote code execution, but stored XSS can still affect administrators, visitors, and site trust.
Technical view
The DSGVO snippet for Leaflet Map and its Extensions plugin is vulnerable to stored XSS in versions up to and including 3.1. The issue involves insufficient sanitization and escaping of shortcode attributes `unset`, `before`, and `after` in `leafext-cookie-time` and `leafext-delete-cookie`. CVSS is 6.4, CWE-79, requiring low privileges.
Likely exposure
Exposure is limited to WordPress sites running this plugin at version 3.1 or earlier, especially where Contributor, Author, Editor, or Administrator accounts are shared, numerous, or not fully trusted.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires authenticated access with Contributor-level privileges or higher and placement of affected shortcode content that later gets viewed.
Researcher notes
Evidence identifies stored XSS via shortcode attributes and vulnerable versions through 3.1. Repository references include the affected file, a 3.1 tag, a later 3.4 tag, and a changeset. The provided structured affected field appears sparse, so rely primarily on the narrative description and Wordfence/CVE references.
Mitigation direction
- Inventory WordPress sites for the DSGVO Leaflet Map plugin and version.
- Update the plugin beyond affected versions, following WordPress or vendor guidance.
- Restrict Contributor-level and higher access to trusted users only.
- Review existing posts and pages containing the affected shortcodes.
- Remove suspicious shortcode attributes or content pending vendor-confirmed remediation.
Validation and detection
- Confirm no site runs the plugin at version 3.1 or earlier.
- Identify content using `leafext-cookie-time` or `leafext-delete-cookie` shortcodes.
- Review shortcode attributes for unexpected or suspicious values.
- Verify contributor permissions are necessary and current.
- After updating, confirm pages render without executing user-supplied script content.
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-2026-4389 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
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/dfeaff92-165a-4006-8e52-a99ae6b68dd9?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/dsgvo-leaflet-map/trunk/php/time-delete.php#L35CVE reference
- https://plugins.trac.wordpress.org/browser/dsgvo-leaflet-map/tags/3.1/php/time-delete.php#L35CVE reference
- https://plugins.trac.wordpress.org/browser/dsgvo-leaflet-map/tags/3.4CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3489426%40dsgvo-leaflet-map%2Ftrunk&old=3488424%40dsgvo-leaflet-map%2Ftrunk&sfp_email=&sfph_mail=CVE reference
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.