CVE-2016-6496

Name: CVE-2016-6496
Creator: NVD / NIST
Published: 2016-12-09T22:59:02.233+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.71%

Last modified Jun 17, 2026

CVE-2016-6496 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 4.71% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

4.71%

90.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Atlassian	Crowd	<= 2.8.4
Atlassian	Crowd	2.9.0
Atlassian	Crowd	2.9.1

References

http://www.securityfocus.com/archive/1/539655/100/0/threaded
http://www.securityfocus.com/bid/93826Third Party Advisory, VDB Entry
https://confluence.atlassian.com/crowd/crowd-security-advisory-2016-10-19-856697283.htmlVendor Advisory
https://jira.atlassian.com/browse/CWD-4790Issue Tracking
https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE-wp.pdfNot Applicable
http://www.securityfocus.com/archive/1/539655/100/0/threaded
http://www.securityfocus.com/bid/93826Third Party Advisory, VDB Entry
https://confluence.atlassian.com/crowd/crowd-security-advisory-2016-10-19-856697283.htmlVendor Advisory
https://jira.atlassian.com/browse/CWD-4790Issue Tracking
https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE-wp.pdfNot Applicable

Timeline

Published: Dec 9, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-6496?

How severe is CVE-2016-6496?

Severity scoring for CVE-2016-6496 is pending analysis. The EPSS model estimates a 4.71% probability of exploitation in the next 30 days.

How do I fix CVE-2016-6496?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-6496?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST