Description
The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.
Remediation
References
Related Vulnerabilities
WordPress Plugin Ticketrilla:Client PHP Object Injection (1.0.1)
phpMyFAQ Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2011-4825)
ReviveAdserver Authorization Bypass Through User-Controlled Key Vulnerability (CVE-2025-52670)
WordPress Plugin Gift Certificate Creator Cross-Site Scripting (1.0.0)
WordPress Plugin PayPal WP Button Manager SQL Injection (0.1.1)