CVE-2016-9299
CriticalExploitedPublic exploitImproper Neutralization of Special Elements used in an LDAP Query in Jenkins
Published May 14, 2022 · Updated Jul 8, 2026 · Also known as GHSA-2x9h-h3c4-wqqh
Key Facts
Patch immediately- CVE-2016-9299 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Jenkins, Fedora (Fedoraproject), org.jenkins-ci.main:jenkins-core (maven).
- It is exploited in the wild, listed in Industry KEV feed since Nov 16, 2016. Public exploit code is available.
- EPSS estimates a 97% probability of exploitation in the next 30 days.
- Fixed versions are available, including Jenkins 2.19.2, Jenkins 2.31, org.jenkins-ci.main:jenkins-core 2.19.3.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
97%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
The remoting module in Jenkins before 2.32 and LTS before 2.19.3 allows remote attackers to execute arbitrary code via a crafted serialized Java object, which triggers an LDAP query to a third-party server.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Nov 16, 2016 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| JenkinsJenkins | See advisory | 2.31 |
| FedoraFedoraproject | 25 | n/a |
| org.jenkins-ci.main:jenkins-coremaven | >= 2.20 | 2.32 |
Patched Releases
Jenkins
2.19.2, 2.31
org.jenkins-ci.main:jenkins-core
2.19.3, 2.32
Timeline
Added to Industry KEV feed
Nov 16, 2016
Publicly disclosed
May 14, 2022
Last updated
Jul 8, 2026
Weakness Type
- CWE-90 Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
- CWE-502 Deserialization of Untrusted Data
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2016-9299
- advisory44642
- advisory94281
- exploitMSF jenkins_ldap_deserialize.rb
FAQ
Common Questions.
The remoting module in Jenkins before 2.32 and LTS before 2.19.3 allows remote attackers to execute arbitrary code via a crafted serialized Java object, which triggers an LDAP query to a third-party server.
Affected: Jenkins; Fedora (Fedoraproject) versions 25; org.jenkins-ci.main:jenkins-core (maven) versions >= 2.20. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Nov 16, 2016.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Jenkins 2.19.2, Jenkins 2.31, org.jenkins-ci.main:jenkins-core 2.19.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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