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.
CVE-2026-77830
Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-09-05. a secondary CVSS source baseline 7.2; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.2
- EG Score
- 7.2(high)
- EG Risk
- 48(Track)EG Risk 48/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity72% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 38%
- KEV
- Not listed
Published
September 5, 2026
Last Modified
September 8, 2026
References (12)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/cleantalk.php#L234
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/ApbctWP/ContactsEncoder/ContactsEncoder.php#L114
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L914
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L933
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/cleantalk.php#L234
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/ApbctWP/ContactsEncoder/ContactsEncoder.php#L114
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L914
- security@wordfencehttps://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L933
- security@wordfencehttps://plugins.trac.wordpress.org/changeset/3677388/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php
- security@wordfencehttps://plugins.trac.wordpress.org/changeset?old_path=%2Fcleantalk-spam-protect/tags/6.86&new_path=%2Fcleantalk-spam-protect/tags/6.87
- security@wordfencehttps://plugins.trac.wordpress.org/changeset?reponame=&new=3677388%40cleantalk-spam-protect%2Ftags%2F6.87&old=3654120%40cleantalk-spam-protect%2Ftags%2F6.86
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/10e7000b-597a-4165-8604-cb6b29714abb?source=cve
Vendor Advisories for CVE-2026-77830(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 26× in last 7d / 77× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-25 01:12 UTCEG score recompute
- 2026-09-25 01:12 UTCGHSA enrichment
- 2026-09-24 14:04 UTCEPSS rescore
- 2026-09-24 12:35 UTCGHSA enrichment
- 2026-09-23 23:58 UTCEG score recompute
- 2026-09-23 23:58 UTCGHSA enrichment
- 2026-09-23 17:54 UTCEPSS rescore
- 2026-09-23 11:20 UTCGHSA enrichment
- 2026-09-22 22:43 UTCEG score recompute
- 2026-09-22 22:43 UTCGHSA enrichment
- 2026-09-22 16:01 UTCEPSS rescore
- 2026-09-22 10:06 UTCGHSA enrichment
- 2026-09-21 21:28 UTCEG score recompute
- 2026-09-21 21:28 UTCGHSA enrichment
- 2026-09-21 21:09 UTCEPSS rescore
- 2026-09-21 08:50 UTCEG score recompute
- 2026-09-21 08:50 UTCGHSA enrichment
- 2026-09-20 20:16 UTCEPSS rescore
- 2026-09-20 19:48 UTCGHSA enrichment
- 2026-09-20 07:09 UTCGHSA enrichment
- 2026-09-19 18:12 UTCEG score recompute
- 2026-09-19 18:11 UTCGHSA enrichment
- 2026-09-19 05:29 UTCEG score recompute
- 2026-09-19 05:29 UTCGHSA enrichment
- 2026-09-18 19:28 UTCEPSS rescore
Show 52 moreShow fewer
- 2026-09-18 16:51 UTCGHSA enrichment
- 2026-09-18 04:14 UTCEG score recompute
- 2026-09-18 04:14 UTCGHSA enrichment
- 2026-09-17 15:37 UTCGHSA enrichment
- 2026-09-17 02:59 UTCEG score recompute
- 2026-09-17 02:59 UTCGHSA enrichment
- 2026-09-16 14:08 UTCEPSS rescore
- 2026-09-16 13:56 UTCEG score recompute
- 2026-09-16 13:56 UTCGHSA enrichment
- 2026-09-16 05:15 UTCEPSS rescore
- 2026-09-16 01:09 UTCGHSA enrichment
- 2026-09-15 12:32 UTCEG score recompute
- 2026-09-15 12:32 UTCGHSA enrichment
- 2026-09-15 03:12 UTCEPSS rescore
- 2026-09-15 03:12 UTCEPSS rescore
- 2026-09-14 23:52 UTCGHSA enrichment
- 2026-09-14 11:15 UTCGHSA enrichment
- 2026-09-13 22:38 UTCEG score recompute
- 2026-09-13 22:38 UTCGHSA enrichment
- 2026-09-13 10:01 UTCGHSA enrichment
- 2026-09-12 21:24 UTCEG score recompute
- 2026-09-12 21:24 UTCGHSA enrichment
- 2026-09-12 08:47 UTCGHSA enrichment
- 2026-09-11 20:09 UTCEG score recompute
- 2026-09-11 20:09 UTCGHSA enrichment
- 2026-09-11 14:53 UTCEPSS rescore
- 2026-09-11 07:17 UTCGHSA enrichment
- 2026-09-10 18:39 UTCEG score recompute
- 2026-09-10 18:39 UTCGHSA enrichment
- 2026-09-10 09:35 UTCEPSS rescore
- 2026-09-10 06:01 UTCGHSA enrichment
- 2026-09-09 17:21 UTCGHSA enrichment
- 2026-09-09 04:43 UTCEG score recompute
- 2026-09-09 04:43 UTCGHSA enrichment
- 2026-09-08 22:01 UTCEPSS rescore
- 2026-09-08 16:06 UTCEG score recompute
- 2026-09-08 16:06 UTCGHSA enrichment
- 2026-09-08 15:13 UTCEG score recompute
- 2026-09-08 15:13 UTCGHSA enrichment
- 2026-09-08 14:16 UTCGHSA enrichment
- 2026-09-08 11:13 UTCGHSA enrichment
- 2026-09-07 22:34 UTCGHSA enrichment
- 2026-09-07 09:56 UTCGHSA enrichment
- 2026-09-06 21:16 UTCEG score recompute
- 2026-09-06 21:16 UTCGHSA enrichment
- 2026-09-06 13:48 UTCEPSS rescore
- 2026-09-06 08:38 UTCGHSA enrichment
- 2026-09-05 20:01 UTCEG score recompute
- 2026-09-05 20:01 UTCGHSA enrichment
- 2026-09-05 07:24 UTCEG score recompute
- 2026-09-05 06:49 UTCEG score recompute
- 2026-09-05 06:48 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-77830?
When was CVE-2026-77830 disclosed?
Is CVE-2026-77830 actively exploited?
What is the CVSS score of CVE-2026-77830?
How do I remediate CVE-2026-77830?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-77830
Is Your Infrastructure Affected by CVE-2026-77830?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.