CVE-2026-10552 json
Blue Captcha <= 2.0.1 - Cross-Site Request Forgery via 'blcap_action' Parameter
published 2026-06-24 4 mo ago modified 2026-06-25 4 mo ago also EUVD-2026-38669
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
The Blue Captcha plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to and including 2.0.1. This is due to missing or incorrect nonce validation on the main admin panel (blcap_main_page) and on the Hall of Shame and Log subpages, which accept a 'blcap_action' / 'action' parameter from $_REQUEST and perform destructive operations (plugin uninstall via blcap_uninstall(), log deletion via blcap_delete_logs(), Hall of Shame deletion via blcap_delete_ip_db(), and adding IPs to the banned list via update_option('blcap_settings')) with no wp_verify_nonce(), check_admin_referer(), or check_ajax_referer() calls anywhere in the codebase. This makes it possible for unauthenticated attackers to uninstall the plugin, delete audit logs, remove Hall of Shame entries, and add arbitrary IP addresses to the block list via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
Affected products
- jotis Blue Captcha
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/793072e9-250b-4a2c-819f-aa7e1dc7d4d6?source=cve
- plugins.trac.wordpress.org /browser/blue-captcha/tags/2.0.1/bluecaptcha.php#L221
- plugins.trac.wordpress.org /browser/blue-captcha/tags/2.0.1/bluecaptcha.php#L220
- plugins.trac.wordpress.org /browser/blue-captcha/tags/2.0.1/bluehos.php#L51
- plugins.trac.wordpress.org /browser/blue-captcha/tags/2.0.1/bluehos.php#L91
- plugins.trac.wordpress.org /browser/blue-captcha/tags/2.0.1/bluelog.php#L62
Sources
- CVE List CVE-2026-10552
- NVD CVE-2026-10552
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.