CVE-2026-25863
Conditional Fields for Contact Form 7 < 2.7.3 DoS via Uncontrolled Resource Consumption
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Conditional Fields for Contact Form 7 WordPress plugin through version 2.6.7 contains an uncontrolled resource consumption vulnerability in the Wpcf7cfMailParser class where the hide_hidden_mail_fields_regex_callback() method reads an iteration count directly from user-supplied POST parameters without validation or upper bound enforcement. Unauthenticated attackers can supply an arbitrarily large integer value through the REST API endpoint to cause unbounded loop execution with multiple preg_replace() operations, exhausting server memory and crashing the PHP process.
| CWE | CWE-1284 |
| Vendor | jules colle |
| Product | conditional fields for contact form 7 |
| Published | May 4, 2026 |
Stay Ahead of the Next One
Get instant alerts for jules colle conditional fields for contact form 7
Be the first to know when new high vulnerabilities affecting jules colle conditional fields for contact form 7 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Jules Colle / Conditional Fields for Contact Form 7
0 < 2.7.3
References
Credits
Rahul Karne VulnCheck