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TI-2026-83573 Aliases CVE-2026-120248GHSA-xxr4-v6q3-9x28

Stored cross-site scripting in Thelia via SVG store logo uploads

Priority LOW 21CWE-79Published · Updated

Key facts

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

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

Summary

Thelia before 3.1.1, Thelia Core before 3.1.1 and the Thelia Back-office Default Twig Template before 1.1.1 are affected. Unsanitized SVG logo and banner uploads are not neutralized, which allows stored cross-site scripting (CWE-79). An authenticated back-office administrator with store update permission can plant scripts that run in the browsers of site visitors and higher-privileged administrators.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Thelia before 3.1.1 contains a stored cross-site scripting vulnerability that allows authenticated back-office administrators with store update permission to inject scripts by uploading unsanitized SVG logo_file or banner_file images. Attackers can upload an SVG with an onload payload served from /admin/store-media/logo or the public cache/images/store/ directory to execute scripts against visitors and higher-privileged administrators.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00239 15th percentileScored 2026-11-07
Fix Fixed Thelia (Thelia): 3.1.1Thelia Core (Thelia): 3.1.1+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
TheliaTheliabefore 3.1.13.1.1Patch availableCNA
TheliaThelia Corebefore 3.1.13.1.1Patch availableCNA
TheliaThelia Back-office Default Twig Templatebefore 1.1.11.1.1Patch availableCNA
  • Thelia VendorThelia Affected before 3.1.1 Fixed in 3.1.1 Patch available CNA
  • Thelia Core VendorThelia Affected before 3.1.1 Fixed in 3.1.1 Patch available CNA
  • Thelia Back-office Default Twig Template VendorThelia Affected before 1.1.1 Fixed in 1.1.1 Patch available CNA

Remediation

Upgrade Thelia and Thelia Core to version 3.1.1 and the Thelia Back-office Default Twig Template to version 1.1.1.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA Thelia (Thelia) Fixed in 3.1.1
  • Fix · CNA Thelia Core (Thelia) Fixed in 3.1.1
  • Fix · CNA Thelia Back-office Default Twig Template (Thelia) Fixed in 1.1.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Thelia Back-office Default Twig Template 1.1.1

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-83574 Cross-site request forgery in Thelia back-office product combination routesPriority MEDIUM 64
    Show all 2 records →

Timeline

  1. 2026-11-01 Threatist record created from CVE-2026-120248
  2. 2026-11-01 Alias added: GHSA-xxr4-v6q3-9x28
  3. 2026-11-02 CISA SSVC decision points changed

References

Patch 3

Advisory 1

Other 2

  • TI-2026-83555 Stored cross-site scripting in Thelia via coupon customer names CVSS 4.0HIGH 7.4
  • TI-2026-83574 Cross-site request forgery in Thelia back-office product combination routes CVSS 4.0MEDIUM 6.9
  • TI-2026-83557 CSRF in Thelia Page Module delete routes lets attackers remove images CVSS 4.0HIGH 7.0
  • TI-2026-83556 Thelia back office CSRF via leaked URL tokens and unprotected actions CVSS 4.0MEDIUM 5.9
  • TI-2026-71031 CSV formula injection in Thelia exports lets visitors run spreadsheet formulas CVSS 4.0LOW 2.3
  • TI-2026-71005 Thelia translation editor flaws allow remote code execution CVSS 3.1HIGH 8.8
See all 18 →

Sources

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