CVE-2026-6399Public exploitNetwork attack vector

Administrator-level stored XSS via unescaped contact number

Published May 20, 2026 · Updated May 20, 2026

Stored XSS in General Options 1.1.0 and earlier allows remote authenticated users to inject scripts through the Contact Number setting. The ad_contact_number value is sanitized with sanitize_text_field() and then emitted inside a double-quoted value attribute without HTML attribute encoding, so an injected quote closes the attribute. Administrator-level access is required to store the payload, which executes when an administrator opens the plugin settings page.

CVSS severity4.4
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in General Options 1.1.0 and earlier allows remote authenticated users to inject scripts through the Contact Number setting. The ad_contact_number value is sanitized with sanitize_text_field() and then emitted inside a double-quoted value attribute without HTML attribute encoding, so an injected quote closes the attribute. Administrator-level access is required to store the payload, which executes when an administrator opens the plugin settings page.

The record

CVE
CVE-2026-6399
Published
May 20, 2026
Updated
May 20, 2026
Vendor
Yogesh Barot
Product
General Options
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Yogesh Barot · General Optionsversion=0 <=1.1.0

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo