CVE-2020-37256: Grav before 1.6.30 contains a cross-site scripting vulnerability in the Admin plugin page editor default secur

Q: How do I fix CVE-2020-37256?

grav: upgrade to 1.6.30. Exact commands for each OS are on this page.

Q: Is CVE-2020-37256 being exploited?

CVE-2020-37256 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-2020-37256 affect?

CVE-2020-37256 affects grav. Severity is medium (CVSS 5.4). Grav before 1.6.30 contains a cross-site scripting vulnerability in the Admin plugin page editor default security configuration. Privileged users with page editing capabilities can inject malicious scripts to execute arbitrary code and inst

Q: How urgent is CVE-2020-37256?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2020-37256 is a medium-severity flaw (CVSS 5.4) affecting grav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Grav before 1.6.30 contains a cross-site scripting vulnerability in the Admin plugin page editor default security configuration. Privileged users with page editing capabilities can inject malicious scripts to execute arbitrary code and install malicious plugins for system access.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-06-25
Last modified	2026-10-08

Publisher (CNA): VulnCheck · Vendor: getgrav

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-25 22:16 UTCPublished CVE record published
2026-10-08 16:16 UTCUpdated Record last modified

getgrav grav UPGRADE

Affected: < 1.6.30

Fixed in: 1.6.30

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.6.30 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade grav

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-2020-37256?

grav: upgrade to 1.6.30. Exact commands for each OS are on this page.

Is CVE-2020-37256 being exploited?

CVE-2020-37256 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-2020-37256 affect?

CVE-2020-37256 affects grav. Severity is medium (CVSS 5.4). Grav before 1.6.30 contains a cross-site scripting vulnerability in the Admin plugin page editor default security configuration. Privileged users with page editing capabilities can inject malicious scripts to execute arbitrary code and inst

How urgent is CVE-2020-37256?

Priority 24/100. No elevated risk signals yet.

Related CVEs

CVE-2026-42608 CRITICAL 9.1 UPGRADE Grav is a file-based Web platform
CVE-2026-42609 HIGH 8.1 UPGRADE Grav is a file-based Web platform
CVE-2026-42611 HIGH 8.9 UPGRADE Grav is a file-based Web platform
CVE-2026-42612 HIGH 8.5 UPGRADE Grav is a file-based Web platform
CVE-2026-44738 HIGH 7.7 UPGRADE Grav is a file-based Web platform

References

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