CVE-2015-2171: Middleware/SessionCookie.php in Slim before 2.6.0 allows remote attackers to conduct PHP object injection a...

Security readout for executives and security teams

This is an old Slim Framework flaw where crafted session data could trigger PHP object injection. The CVE description says this could lead to arbitrary PHP code execution in Slim versions before 2.6.0. Business urgency depends on whether any legacy PHP applications still run that affected version and middleware. Exposure is most likely in legacy PHP applications still using Slim before 2.6.0, especially where the SessionCookie middleware is present on externally reachable routes. The supplied affected-product metadata is incomplete, so confirm through dependency manifests and deployed application inventory. Treat this as a high-priority legacy exposure check, not a blanket emergency. The code-execution impact is serious, but urgency depends on whether the organization still runs Slim before 2.6.0 in reachable PHP applications. Mitigation focus: Inventory PHP applications for Slim framework usage and exact deployed versions.; Upgrade affected Slim installations to 2.6.0 or later per vendor release guidance.; Review the linked Slim issue and release note for vendor-specific context..

Prepared

Jun 14, 2026, 05:11 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.