What’s Vulnerable › Vulnerabilities

CVE-2016-6496

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-12-09 · updated 2026-06-17
• Weakness: CWE-20

Description

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.

Affected products

• Atlassian Crowd: through 2.8.4; 2.9.0, 2.9.1

References

• http://www.securityfocus.com/archive/1/539655/100/0/threaded
• http://www.securityfocus.com/bid/93826
• https://confluence.atlassian.com/crowd/crowd-security-advisory-2016-10-19-856697283.html
• https://jira.atlassian.com/browse/CWD-4790
• https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE-wp.pdf
• http://www.securityfocus.com/archive/1/539655/100/0/threaded
• http://www.securityfocus.com/bid/93826
• https://confluence.atlassian.com/crowd/crowd-security-advisory-2016-10-19-856697283.html
• https://jira.atlassian.com/browse/CWD-4790
• https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE-wp.pdf

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