What is the CVSS score of CVE-2020-36955?

CVE-2020-36955 has a CVSS 3.1 base score of 6.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Plugin are affected by CVE-2020-36955?

Organizations using Grav CMS 1.6.30 with Admin Plugin 1.9.18 should be aware of moderate risk from CVE-2020-36955, a cross-site scripting vulnerability rated CVSS 6.4.

Is there a public PoC exploit available for CVE-2020-36955?

Yes, a public proof-of-concept exploit is available for CVE-2020-36955. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2020-36955?

Within 30 days: Identify affected systems running Plugin 1.9.18 contains a persistent cross-site scripting vul and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Plugin CVE-2020-36955

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-26 disclosure@vulncheck.com

XSS

6.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.4 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:00 vuln.today

PoC Detected

Jan 27, 2026 - 14:59 vuln.today

Public exploit code

CVE Published

Jan 26, 2026 - 18:16 nvd

MEDIUM 6.4

DescriptionCVE.org

Grav CMS 1.6.30 with Admin Plugin 1.9.18 contains a persistent cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the page title field. Attackers can create a new page with a malicious script in the title, which will be executed when the page is viewed in the admin panel or on the site.

AnalysisAI

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Grav CMS 1.6.30 with Admin Plugin 1.9.18 contains a persistent cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the page title field. Attackers can create a new page with a malicious script in the title, which will be executed when the page is viewed in the admin panel or on the site.

Affected ProductsAI

Grav CMS 1.6.30 with Admin Plugin 1.9.18 contains a persistent cross-site scripting vulnerability that allows authenticated attackers to inject malici

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

CVE-2020-36955 vulnerability details – vuln.today

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