CVE-2015-2171

Slim vulnerable to PHP object injection

7.5 HighFix available

Middleware/SessionCookie.php in Slim before 2.6.0 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted session data.

Exploit likelihood

2.50%Up 1.3 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Middleware/SessionCookie.php in Slim before 2.6.0 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted session data.

Record: CVE-2015-2171
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-94
Updated: 2026-11-02

CVE List No score

Middleware/SessionCookie.php in Slim before 2.6.0 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted session data.

Record: CVE-2015-2171
Updated: 2026-11-02

EUVDEUVD-2022-2914 No score

Middleware/SessionCookie.php in Slim before 2.6.0 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted session data.

Record: EUVD-2022-2914
Updated: 2026-11-03

GitHub AdvisoriesGHSA-74mf-vjpg-9xh7 No score

Slim vulnerable to PHP object injection

Middleware/SessionCookie.php in Slim before 2.6.0 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted session data.

Record: GHSA-74mf-vjpg-9xh7
Weakness: CWE-94
Updated: 2026-11-02

OSVGHSA-74mf-vjpg-9xh7 No score

Slim vulnerable to PHP object injection

Middleware/SessionCookie.php in Slim before 2.6.0 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted session data.

Record: GHSA-74mf-vjpg-9xh7
Weakness: CWE-94
Updated: 2026-11-02

Affected products

slimframework slim

Affected packages

Affected packages
Package	Affected	Fixed
`slim/slim` Packagist	before 2.6.0	2.6.0
`slim/slim` Packagist	before 2.6.0, plus listed versions 1.6.01.6.11.6.21.6.31.6.4 Show 17 moreShow less 1.6.51.6.61.6.72.0.02.1.02.2.02.3.02.3.12.3.22.3.32.3.42.3.52.4.02.4.12.4.22.4.32.5.0	2.6.0

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-2171 is a high vulnerability (CVSS 7.5) in Slimframework Slim, published March 30, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.50%, the 84th percentile. Fixed in slim/slim 2.6.0.

References

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