CVE-2025-67586Public exploitNetwork attack vector

Unauthorized email sending via unprotected AJAX action

Published Dec 9, 2025 · Updated Apr 28, 2026

Missing authorization in Highlight and Share 5.2.0 and earlier allows remote attackers to send email through a WordPress site. The unauthenticated has_email_form_submission AJAX handler accepts a public post nonce and form data without checking user authorization. Exploitation requires a valid nonce exposed by the public sharing workflow and causes the site to relay attacker-chosen messages.

CVSS severity4.7
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Highlight and Share 5.2.0 and earlier allows remote attackers to send email through a WordPress site. The unauthenticated has_email_form_submission AJAX handler accepts a public post nonce and form data without checking user authorization. Exploitation requires a valid nonce exposed by the public sharing workflow and causes the site to relay attacker-chosen messages.

The record

CVE
CVE-2025-67586
Published
Dec 9, 2025
Updated
Apr 28, 2026
Vendor
Ronald Huereca
Product
Highlight and Share
Classifications
CWE-862, CAPEC-180, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=5.2.0 changes=[{"at":"5.3.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ronald Huereca · Highlight and Shareversion=0 <=5.2.0 changes=[{"at":"5.3.0","status":"unaffected"}]

Published CVSS scores

4.7PatchstackCVSS:3.1/AV:N/AC:H/PR:N/UI:R/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

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Your stack

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