Security readout for executives and security teams
Plain-English summary
CVE-2026-4067 affects the WordPress Ad Short plugin up to version 2.0.1. A logged-in user with Contributor-level access or higher can store script in a shortcode attribute. That script may run when visitors view the affected page. This is mainly a site integrity and user-trust risk, not a server takeover based on available sources.
Executive priority
Treat as a moderate-priority WordPress application risk. Prioritize sites with many contributors, public publishing workflows, or sensitive authenticated users. The main concern is malicious script execution against site visitors or administrators, but sources do not indicate active exploitation or server compromise.
Technical view
The issue is stored cross-site scripting in the Ad Short plugin’s ad shortcode client attribute. Sources state ad_func() accepts client via shortcode_atts() and concatenates it into a data-ad-client HTML attribute without adequate sanitization or escaping. CVSS is 6.4, CWE-79, with low privileges required and changed scope.
Likely exposure
Exposure is likely limited to WordPress sites running Ad Short version 2.0.1 or earlier where untrusted or compromised Contributor-level accounts can create content using the vulnerable shortcode. Sites without the plugin, without contributor access, or not using the shortcode are less exposed.
Exploitation context
The CVE is not listed as CISA KEV in the provided data, and no source states active exploitation. The attacker must already have authenticated Contributor-level or higher access. Successful exploitation can execute script in browsers of users who view the injected page.
Researcher notes
Evidence points to missing attribute escaping around data-ad-client in ad_short.php line 130, with shortcode attribute handling around line 77. The source bundle has an affected-product metadata inconsistency, but the description and title state versions through 2.0.1 are affected. No confirmed patch version is provided.
Mitigation direction
- Check whether Ad Short is installed and determine its version.
- Review vendor or WordPress plugin guidance for an updated fixed release.
- Disable or remove the plugin if it is not business-critical.
- Limit Contributor-level access to trusted accounts only.
- Review existing posts and pages using the Ad Short shortcode.
Validation and detection
- Inventory WordPress sites for the Ad Short plugin.
- Confirm whether installed versions are 2.0.1 or earlier.
- Identify posts or pages containing the ad shortcode client attribute.
- Review recent edits by Contributor-level and higher accounts.
- Monitor web security logs for suspicious script execution indicators.
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-2026-4067 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/313d2749-7662-4870-b0f7-19253797f833?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/ad-short/trunk/ad_short.php#L130CVE reference
- https://plugins.trac.wordpress.org/browser/ad-short/tags/2.0.1/ad_short.php#L130CVE 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.