How severe is CVE-2016-6637?

CVE-2016-6637 has a CVSS score of 9.6/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2016-6637?

CVE-2016-6637 affects the following packages: org.cloudfoundry.identity:cloudfoundry-identity-server (Maven), org.cloudfoundry.identity:cloudfoundry-identity-server (Maven), org.cloudfoundry.identity:cloudfoundry-identity-server (Maven), org.cloudfoundry.identity:cloudfoundry-identity-server (Maven). Ecosystems affected: Maven.

How do I fix CVE-2016-6637?

Update org.cloudfoundry.identity:cloudfoundry-identity-server to 2.7.4.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-6637 is resolved across your whole dependency graph.

How do I detect CVE-2016-6637 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.cloudfoundry.identity:cloudfoundry-identity-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2016-6637 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2016-6637 actively exploited in the wild?

No public exploit code has been indexed for CVE-2016-6637 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2016-6637?

CVE-2016-6637 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 54th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2016-6637?

CVE-2016-6637 is classified as Cross-Site Request Forgery (CSRF) (CWE-352). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2016-6637 published, and has it been updated?

CVE-2016-6637 was published on September 30, 2016 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

CRITICAL severity

CVE-2016-6637 — cloudfoundry-identity-ser…

CRITICALFix: cloudfoundry/uaa@37e0384

CVE-2016-6637 is a critical-severity (CVSS 9.6) Cross-Site Request Forgery (CSRF) vulnerability in org.cloudfoundry.identity:cloudfoundry-identity-server. A fix is available for org.cloudfoundry.identity:cloudfoundry-identity-server — see the affected versions and patch details below.

Cloud Foundry vulnerable to Cross-Site Request Forgery

Also known asGHSA-4m8c-h7fr-gq5c

Published

Sep 30, 2016

Updated

Oct 24, 2026

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Exploitation data as of Oct 24, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs54th percentile — riskier than 54% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected

☕org.cloudfoundry.identity:cloudfoundry-identity-server☕org.cloudfoundry.identity:cloudfoundry-identity-server☕org.cloudfoundry.identity:cloudfoundry-identity-server☕org.cloudfoundry.identity:cloudfoundry-identity-server

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Multiple cross-site request forgery (CSRF) vulnerabilities in Pivotal Cloud Foundry (PCF) before 242; UAA 2.x before 2.7.4.7, 3.x before 3.3.0.5, and 3.4.x before 3.4.4; UAA BOSH before 11.5 and 12.x before 12.5; Elastic Runtime before 1.6.40, 1.7.x before 1.7.21, and 1.8.x before 1.8.2; and Ops Manager 1.7.x before 1.7.13 and 1.8.x before 1.8.1 allow remote attackers to hijack the authentication of unspecified victims for requests that approve or deny a scope via a profile or authorize approval page.

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.cloudfoundry.identity:cloudfoundry-identity-server`	≥ 2.0.0&&< 2.7.4.7	2.7.4.7`org.cloudfoundry.identity:cloudfoundry-identity-server:2.7.4.7`
☕Maven	`org.cloudfoundry.identity:cloudfoundry-identity-server`	≥ 3.0.0&&< 3.3.0.5	3.3.0.5`org.cloudfoundry.identity:cloudfoundry-identity-server:3.3.0.5`
☕Maven	`org.cloudfoundry.identity:cloudfoundry-identity-server`	≥ 3.4.0&&< 3.4.4	3.4.4`org.cloudfoundry.identity:cloudfoundry-identity-server:3.4.4`
☕Maven	`org.cloudfoundry.identity:cloudfoundry-identity-server`	≥ 3.5.0&&< 3.7.0	3.7.0`org.cloudfoundry.identity:cloudfoundry-identity-server:3.7.0`

Affected Products

5 products · 97 configurations

Application

cloud foundry uaa boshcloudfoundry

≤ 15.0

range

Application

cloud foundrypivotal_software

≤ 241

range

Application

cloud foundry elastic runtimepivotal_software

60 versions

1.6.01.6.11.6.21.6.31.6.41.6.51.6.61.6.71.6.81.6.91.6.101.6.11

Application

cloud foundry ops managerpivotal_software

14 versions

1.7.01.7.11.7.21.7.31.7.41.7.51.7.61.7.71.7.81.7.91.7.101.7.11

Application

cloud foundry uaapivotal_software

21 versions

2.3.02.3.12.4.02.5.12.6.12.7.0.22.7.0.32.7.12.7.22.7.32.7.4.63.0.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.cloudfoundry.identity:cloudfoundry-identity-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.cloudfoundry.identity:cloudfoundry-identity-server to 2.7.4.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-6637 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2016-6637 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

9.6/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Raw vector

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

CWE Classification

CWE-352Cross-Site Request Forgery (CSRF)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

uaa

7.0/10

Maintained10/10

Code-Review10/10

Branch-ProtectionN/A

Assessed Oct 19, 2026

Timeline

Disclosed

Sep 30, 2016

Last updated

Oct 24, 2026

Identifiers

CVE-2016-6637

GHSA-4m8c-h7fr-gq5c

References

Advisorypivotal.io · cve 2016 6637 Advisorynvd.nist.gov · CVE 2016 6637 Websecurityfocus.com Webgithub.com · 37e0384c52d3337a3fa4eef6647032229edecfa4 Webgithub.com · cded6164a3b90e791688a954069aea3cfde59b69 Webgithub.com · f3d8a9e1ee1acac5bf1f8487ac9461f4cf4505c Webweb.archive.org

Related vulnerabilities

This CVE is critical severity — higher than any of the other 8 CVEs affecting cloudfoundry-identity-server (highest there: high).

CVE-2026-22723CVE-2016-5016CVE-2018-1192CVE-2018-11041CVE-2018-15761CVE-2018-1262CVE-2017-8032CVE-2017-4991

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2016-6637 — cloudfoundry-identity-ser…

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2016-6637 in your dependencies?