What is the CVSS score of CVE-2026-27147?

CVE-2026-27147 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Getsimple Cms are affected by CVE-2026-27147?

Organizations using GetSimple CMS should be aware of moderate risk from CVE-2026-27147, a cross-site scripting vulnerability rated CVSS 5.4.

Is there a public PoC exploit available for CVE-2026-27147?

Yes, a public proof-of-concept exploit is available for CVE-2026-27147. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-27147?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Getsimple Cms CVE-2026-27147

MEDIUM

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

2026-02-21 security-advisories@github.com

XSS Getsimple Cms

5.4

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.4 MEDIUM

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:04 vuln.today

PoC Detected

Feb 24, 2026 - 13:11 vuln.today

Public exploit code

CVE Published

Feb 21, 2026 - 00:16 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

GetSimple CMS is a content management system. All versions of GetSimple CMS are vulnerable to XSS through SVG file uploads. Authenticated users can upload SVG files via the administrative upload functionality, but they are not properly sanitized or restricted, allowing an attacker to embed malicious JavaScript. When the uploaded SVG file is accessed, the script executes in the browser. This issue does not have a fix at the time of publication.

AnalysisAI

GetSimple CMS allows authenticated users to upload SVG files containing malicious JavaScript through the administrative interface, which executes in browsers when the files are accessed due to insufficient sanitization. Public exploit code exists for this stored XSS vulnerability, and no patch is currently available, leaving all GetSimple CMS versions at risk.

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Vulnerability AssessmentAI

Risk Assessment	CVSS 5.4 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-27147 vulnerability details – vuln.today

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