Security readout for executives and security teams
Plain-English summary
CVE-2026-1399 affects the WP Google Ad Manager Plugin for WordPress through version 1.1.0. A site administrator could save malicious script in plugin settings, causing it to run for users who view the affected page. Impact is limited because attacker privileges must already be high and the issue applies only to specific WordPress configurations.
Executive priority
Treat as a targeted cleanup item, not an emergency unless affected sites have many administrators or weak admin account controls. Prioritize inventory, privilege review, and vendor update monitoring. The risk is moderate because exploitation requires administrator-level access and applies only in specific configurations.
Technical view
Stored cross-site scripting exists in admin settings due to insufficient input sanitization and output escaping. The CVSS 3.1 score is 4.4 medium: network reachable, high complexity, high privileges required, changed scope, low confidentiality and integrity impact, no availability impact. Sources state it affects multisite installations and installations where unfiltered_html is disabled.
Likely exposure
Exposure is likely limited to WordPress sites using WP Google Ad Manager Plugin version 1.1.0 or earlier, specifically multisite environments or sites where unfiltered_html is disabled. Sites without the plugin, or outside those configurations, are not indicated as affected by the provided sources.
Exploitation context
The attacker must already have administrator-level permissions or higher. No CISA KEV listing is present, and the provided sources do not state active exploitation. The business risk is mainly malicious script execution against site users or administrators after privileged access is obtained.
Researcher notes
The source bundle does not name a fixed version. The WordPress Trac references point to plugin code around the reported setting handling area. Avoid assuming broader impact beyond the stated multisite and unfiltered_html-disabled cases. Active exploitation is not supported by KEV or the provided references.
Mitigation direction
- Identify sites running WP Google Ad Manager Plugin version 1.1.0 or earlier.
- Check vendor, WordPress plugin, and Wordfence guidance for an official fix or replacement.
- Remove or disable the plugin if it is not business-critical.
- Restrict administrator access to trusted users and enforce strong account security.
- Review plugin settings for unexpected script content or unauthorized changes.
Validation and detection
- Inventory WordPress sites for the WP Google Ad Manager Plugin and installed version.
- Confirm whether each site is multisite or has unfiltered_html disabled.
- Review administrator accounts for unnecessary or suspicious privileged access.
- Inspect relevant plugin settings for unexpected HTML or script entries.
- Monitor CVE and Wordfence references for updated remediation details.
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-2026-1399 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
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:H/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:H/PR:H/UI:N/S:C/C:L/I:L/A:N1.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:N/AC:H/PR:H/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/f3185d82-a785-4165-8469-abc0be38f852?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/wp-google-ad-manager-plugin/trunk/WP-Google-Ad-Manager.php#L194CVE reference
- https://plugins.trac.wordpress.org/browser/wp-google-ad-manager-plugin/tags/1.1.0/WP-Google-Ad-Manager.php#L194CVE 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.