CVE-2026-57859

Description

e107 prior to version 2.3.8 contains a code execution vulnerability in the e_array deserialization handler that allows an attacker with out-of-band database write access to execute arbitrary PHP code by storing a crafted payload in the user_prefs column. The e_array::unserialize() function in e107_handlers/core_functions.php performs only a prefix check for the string 'array' before passing the stored value to eval(), causing automatic PHP execution whenever the affected user's preferences are materialized through e_user_pref::load().

References

• https://github.com/e107inc/e107
• https://github.com/e107inc/e107/commit/40e73cefde85b32e1227dfac9956a5cb87046277
• https://github.com/e107inc/e107/security/advisories/GHSA-568x-w5qj-vr7c
• https://www.vulncheck.com/advisories/e107-second-order-code-execution-via-eval-based-deserialization-in-e-array-unserialize
• https://github.com/e107inc/e107/security/advisories/GHSA-568x-w5qj-vr7c