Security readout for executives and security teams
Plain-English summary
This flaw lets an authenticated WordPress administrator store malicious browser script through Google Maps Easy marker group settings. The issue matters mainly where administrators are not allowed to use unfiltered HTML, such as multisite or hardened sites. It is not a remote unauthenticated takeover based on the provided sources.
Executive priority
Treat this as a moderate-priority hygiene issue. It is constrained by administrator-level access, but stored XSS can undermine hardened WordPress configurations and create risk in multisite environments.
Technical view
CVE-2021-39346 is a stored XSS in Google Maps Easy for WordPress through version 1.9.33. Insufficient validation and sanitization in the marker group edit template allowed high-privilege users to save script content that could execute when viewed by another user. CVSS is 4.8, with high privileges and user interaction required.
Likely exposure
Exposure is limited to WordPress sites using Google Maps Easy version 1.9.33 or earlier, especially multisite deployments or configurations where unfiltered_html is disabled for administrators.
Exploitation context
The provided bundle does not show CISA KEV listing or confirmed active exploitation. Public references include an external report and a WordPress plugin changeset, but the evidence supports authenticated stored XSS only.
Researcher notes
The scope is narrow: authenticated, high-privilege stored XSS in marker group editing. Do not assume broader plugin compromise, unauthenticated exploitation, or active exploitation from the supplied evidence. The WordPress changeset is the key source for fix verification.
Mitigation direction
- Upgrade Google Maps Easy beyond version 1.9.33 if a fixed release is available.
- Check WordPress plugin and vendor guidance for the relevant security fix.
- Restrict administrator access to trusted users only.
- Review multisite settings where unfiltered_html is disabled.
- Audit saved marker group content for unexpected script-like markup.
Validation and detection
- Inventory WordPress sites for the Google Maps Easy plugin version.
- Confirm whether affected sites run version 1.9.33 or earlier.
- Review administrator and multisite role assignments.
- Inspect marker group records for suspicious stored HTML or script content.
- Verify remediation against the WordPress plugin changeset or vendor advisory.
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-2021-39346 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
- 4.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/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:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/BigTiger2020/word-press/blob/main/Google%20Maps%20Easy.mdCVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/changeset/2620851/google-maps-easy/trunk/modules/marker_groups/views/tpl/mgrEditMarkerGroup.phpCVE reference · x_refsource_MISC
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39346CVE reference · x_refsource_MISC
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.