CVE-2016-6521: Cross-site request forgery (CSRF) vulnerability in Grails console (aka Grails Debug Console and Grails Web Con

Q: How do I fix CVE-2016-6521?

grails: upgrade to newer than 1.5.9. Exact commands for each OS are on this page.

Q: Is CVE-2016-6521 being exploited?

CVE-2016-6521 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-6521 affect?

CVE-2016-6521 affects grails. Severity is high (CVSS 8.8). Cross-site request forgery (CSRF) vulnerability in Grails console (aka Grails Debug Console and Grails Web Console) 2.0.7, 1.5.10, and earlier allows remote attackers to hijack the authentication of users for requests that execute arbitrary

Q: How urgent is CVE-2016-6521?

Priority 50/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2016-6521 is a high-severity flaw (CVSS 8.8) affecting grails. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site request forgery (CSRF) vulnerability in Grails console (aka Grails Debug Console and Grails Web Console) 2.0.7, 1.5.10, and earlier allows remote attackers to hijack the authentication of users for requests that execute arbitrary Groovy code via unspecified vectors.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-352
Published	2017-01-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gopivotal

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-01-23 21:59 UTCPublished CVE record published
2026-06-17 00:51 UTCUpdated Record last modified

gopivotal grails UPGRADE

Affected: <= 1.5.9 · 2.0.6

Fixed in: newer than 1.5.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy grails || rpm -q grails || grails --version

2. UPGRADE to newer than 1.5.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade grails

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade grails

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-6521?

grails: upgrade to newer than 1.5.9. Exact commands for each OS are on this page.

Is CVE-2016-6521 being exploited?

CVE-2016-6521 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-6521 affect?

CVE-2016-6521 affects grails. Severity is high (CVSS 8.8). Cross-site request forgery (CSRF) vulnerability in Grails console (aka Grails Debug Console and Grails Web Console) 2.0.7, 1.5.10, and earlier allows remote attackers to hijack the authentication of users for requests that execute arbitrary

How urgent is CVE-2016-6521?

Priority 50/100. High severity; Public exploit reference

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References

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