The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content.
Published 2016-05-16 10:59:20
Updated 2025-04-12 10:46:41
Source OpenText
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionExecute codeDenial of service

Products affected by CVE-2015-6835

Threat overview for CVE-2015-6835

Top countries where our scanners detected CVE-2015-6835
Top open port discovered on systems with this issue 80
IPs affected by CVE-2015-6835 550,424
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2015-6835!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2015-6835

20.13%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 95 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2015-6835

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
9.8
CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

References for CVE-2015-6835

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