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CVE-2020-37256

Grav - Cross-Site Scripting in Admin Plugin Page Editor

MEDIUM
5.4
CVSS Score
Published: June 25, 2026 at 09:41 PM UTC
Updated: October 8, 2026 at 04:16 PM UTC
3 products affected across 2 vendorsGravGrav Plugin AdminGrav

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Grav· Getgravcomposer
95%
v < 1.6.30*
Affected range stops below 1.6.30, so it looks safe — our inference, not a vendor statement
Grav Plugin Admin· Getgrav
95%
v < 1.6.30
Affected range stops below 1.6.30, so it looks safe — our inference, not a vendor statement
Grav· Grav
90%
0 ≤ v < 1.6.300
Vendor states this is fixed in 1.6.30 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/getgrav/grav/security/advisories/GHSA-cvmr-6428-87w9
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/grav-cross-site-scripting-in-admin-plugin-page-editor

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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