Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.86 - Unauthenticated Stored Cross-Site Scripting via Comment Content aria-label Placeholder

Summary

CVE	CVE-2026-77830
State	PUBLISHED
Assigner	Wordfence
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-09-05 07:17:12 UTC
Updated	2026-09-05 07:17:12 UTC
Description	The Spam protection, Honeypot, Anti-Spam by CleanTalk plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content aria-label Placeholder in all versions up to, and including, 6.86 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is deliverable via unauthenticated comment submission and executes exclusively for non-logged-in visitors; if comment moderation is enabled, an approving moderator must first publish the comment before the script reaches other users.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	7.2	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`
3.1	CNA	DECLARED	7.2	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Cleantalk	Spam Protection Honeypot Anti-Spam By CleanTalk	affected 6.86 semver	Not specified

References

Reference	Source	Link	Tags
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/ApbctW...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/cleantalk.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common...	[email protected]	plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/10e7000b-597a-4165-8604-cb6b2...	[email protected]	www.wordfence.com
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/cleantalk.php	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3677388/cleantalk-spam-protect/trunk/lib/Cleantalk/...	[email protected]	plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/ApbctW...	[email protected]	plugins.trac.wordpress.org
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: theviper17y (en)

Additional Advisory Data

Source	Time	Event
CNA	2026-08-21T15:09:31.000Z	Vendor Notified
CNA	2026-09-04T18:03:03.000Z	Disclosed

There are currently no legacy QID mappings associated with this CVE.