Vulnerability record · CVE-2016-6496 · published 9 December 2016

CVE-2016-6496: Atlassian crowd improper input validation vulnerability

Atlassian · Crowd

The LDAP directory connector in Atlassian Crowd before 2.8.8 and 2.9.x before 2.9.5 allows remote attackers to execute arbitrary code via an LDAP attribute with a crafted serialized Java object, aka LDAP entry poisoning.

9.8 CVSS 3.0 Critical EPSS 4.7% · top 8.5% CWE-20 · Improper input validation

9.8CVSS 3.0 base score, v2 7.5

4.7%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

10References

17 Jun 2026Last modified by NVD

Description

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Crowd Atlassian

References

Link	Tags
http://www.securityfocus.com/archive/1/539655/100/0/threaded
http://www.securityfocus.com/bid/93826	Third Party AdvisoryVDB Entry
https://confluence.atlassian.com/crowd/crowd-security-advisory-2016-10-19-856697283.html	Vendor Advisory
https://jira.atlassian.com/browse/CWD-4790	Issue Tracking
https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE-wp.pdf	Not Applicable
http://www.securityfocus.com/archive/1/539655/100/0/threaded
http://www.securityfocus.com/bid/93826	Third Party AdvisoryVDB Entry
https://confluence.atlassian.com/crowd/crowd-security-advisory-2016-10-19-856697283.html	Vendor Advisory
https://jira.atlassian.com/browse/CWD-4790	Issue Tracking
https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE-wp.pdf	Not Applicable

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-6496), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.