Description
spl_array.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and application crash) via crafted serialized data.
Remediation
References
Related Vulnerabilities
WordPress Improper Input Validation Vulnerability (CVE-2020-28037)
WebLogic Incorrect Authorization Vulnerability (CVE-2018-1258)
WordPress Plugin Spam protection, AntiSpam, FireWall by CleanTalk Cross-Site Scripting (5.136.3)
PHP Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2017-11145)