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TI-2026-22003 Aliases CVE-2026-27621GHSA-xfvg-8v67-j7wp

TypiCMS Core has Stored Cross-Site Scripting (XSS) via SVG File Upload

Priority MEDIUM 63CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00224 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Core (TypiCMS): 16.1.7typicms/core (Packagist): 16.1.7, 15.0.29, 14.0.27 +2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TypiCMSCorebefore 16.1.716.1.7Patch availableCNA
—typicms/core (Packagist)16.0.0 to before 16.1.716.1.7Patch availableGHSA-xfvg-8v67-j7wp
—typicms/core (Packagist)15.0.0 to before 15.0.2915.0.29Patch availableGHSA-xfvg-8v67-j7wp
—typicms/core (Packagist)14.0.0 to before 14.0.2714.0.27Patch availableGHSA-xfvg-8v67-j7wp
—typicms/core (Packagist)13.0.0 to before 13.0.913.0.9Patch availableGHSA-xfvg-8v67-j7wp
—typicms/core (Packagist)before 12.0.512.0.5Patch availableGHSA-xfvg-8v67-j7wp
  • Core VendorTypiCMS Affected before 16.1.7 Fixed in 16.1.7 Patch available CNA
  • typicms/core (Packagist) Vendor— Affected 16.0.0 to before 16.1.7 Fixed in 16.1.7 Patch available GHSA-xfvg-8v67-j7wp
  • typicms/core (Packagist) Vendor— Affected 15.0.0 to before 15.0.29 Fixed in 15.0.29 Patch available GHSA-xfvg-8v67-j7wp
  • typicms/core (Packagist) Vendor— Affected 14.0.0 to before 14.0.27 Fixed in 14.0.27 Patch available GHSA-xfvg-8v67-j7wp
  • typicms/core (Packagist) Vendor— Affected 13.0.0 to before 13.0.9 Fixed in 13.0.9 Patch available GHSA-xfvg-8v67-j7wp
  • typicms/core (Packagist) Vendor— Affected before 12.0.5 Fixed in 12.0.5 Patch available GHSA-xfvg-8v67-j7wp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:typicms:typicms:*:*:*:*:*:*:*:*before 16.1.7VulnerableTypiCMS
  • cpe:2.3:a:typicms:typicms:*:*:*:*:*:*:*:* Versions before 16.1.7 Vulnerable ·TypiCMS

Remediation

  • Fix · CNA Core (TypiCMS) Fixed in 16.1.7
  • Fix · GHSA-xfvg-8v67-j7wp typicms/core (Packagist) Fixed in 16.1.7 Advisory →
  • Fix · GHSA-xfvg-8v67-j7wp typicms/core (Packagist) Fixed in 15.0.29 Advisory →
  • Fix · GHSA-xfvg-8v67-j7wp typicms/core (Packagist) Fixed in 14.0.27 Advisory →
  • Fix · GHSA-xfvg-8v67-j7wp typicms/core (Packagist) Fixed in 13.0.9 Advisory →
  • Fix · GHSA-xfvg-8v67-j7wp typicms/core (Packagist) Fixed in 12.0.5 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27621
  2. 2026-10-03 Alias added: GHSA-xfvg-8v67-j7wp

References

Exploit 1

Patch 1

Advisory 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences