What is the CVSS score of CVE-2026-27621?

CVE-2026-27621 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 Laravel are affected by CVE-2026-27621?

Organizations using the file upload module of TypiCMS should be aware of moderate risk from CVE-2026-27621, a cross-site scripting vulnerability rated CVSS 5.4.. A patch is available.

Is there a public PoC exploit available for CVE-2026-27621?

Yes, a public proof-of-concept exploit is available for CVE-2026-27621. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-27621?

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

Laravel CVE-2026-27621

MEDIUM

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

2026-02-25 security-advisories@github.com

GHSA-xfvg-8v67-j7wp

Laravel XSS Typicms

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 - 21:55 vuln.today

PoC Detected

Feb 27, 2026 - 19:02 vuln.today

Public exploit code

Patch released

Feb 27, 2026 - 19:02 nvd

Patch available

CVE Published

Feb 25, 2026 - 03:16 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

TypiCMS is a multilingual content management system based on the Laravel framework. A Stored Cross-Site Scripting (XSS) vulnerability exists in the file upload module of TypiCMS prior to version 16.1.7. The application allows users with file upload permissions to upload SVG files. While there is a MIME type validation, the content of the SVG file is not sanitized. An attacker can upload a specially crafted SVG file containing malicious JavaScript code. When another user (such as an administrator) views or accesses this file through the application, the script executes in their browser, leading to a compromise of that user's session. The issue is exacerbated by a bug in the SVG parsing logic, which can cause a 500 error if the uploaded SVG does not contain a viewBox attribute. However, this does not mitigate the XSS vulnerability, as an attacker can easily include a valid viewBox attribute in their malicious payload. Version 16.1.7 of TypiCMS Core fixes the issue.

AnalysisAI

Stored XSS in TypiCMS prior to version 16.1.7 allows authenticated users to upload malicious SVG files that execute JavaScript in administrators' browsers, compromising their sessions through unsanitized file content. Public exploit code exists for this vulnerability affecting Laravel-based TypiCMS installations. The flaw stems from insufficient validation of SVG file contents despite MIME type checks being present.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the file upload component of Typicms. TypiCMS is a multilingual content management system based on the Laravel framework. A Stored Cross-Site Scripting (XSS) vulnerability exists in the file upload module of TypiCMS prior to version 16.1.7. The application allows users with file upload permissions to upload SVG files. While there is a MIME type validation, the content of the SVG file is not sanitized. An attacker can upload a specially crafted SVG file containing malicious JavaScript code. When another user (such as an administrator

RemediationAI

A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.