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TI-2026-71031 Aliases CVE-2026-109396GHSA-w4v5-q3gm-mcf9

CSV formula injection in Thelia exports lets visitors run spreadsheet formulas

Priority MEDIUM 45CWE-1236Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Thelia before 3.1.2 and from 3.2.0 before 3.2.1 contains a CSV formula injection flaw (CWE-1236) in its exports. An unauthenticated visitor can submit names, addresses or phone values beginning with =, +, - or @ through registration, checkout or newsletter fields, and the export writes them verbatim, so spreadsheet formulas run when an administrator opens the file.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Thelia before 3.1.2 and 3.2.x before 3.2.1 contains a CSV formula injection vulnerability that allows unauthenticated visitors to inject spreadsheet formulas by supplying crafted registration, checkout or newsletter fields. Attackers can submit names, addresses or phone values starting with =, +, - or @ that CSVSerializer exports verbatim, executing formulas in the administrator's spreadsheet application.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Fix Fixed Thelia (Thelia): 3.1.2, 3.2.1

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
TheliaTheliabefore 3.1.2; 3.2.0 to before 3.2.13.1.2, 3.2.1Patch availableCNA
  • Thelia VendorThelia Affected before 3.1.2; 3.2.0 to before 3.2.1 Fixed in 3.1.2, 3.2.1 Patch available CNA

Remediation

Upgrade Thelia to version 3.1.2 or, for the 3.2 branch, to version 3.2.1. The sources list no advisory identifier for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Thelia (Thelia) Fixed in 3.1.2, 3.2.1

Fixed in the same release

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

  • Release ·

    Thelia 3.1.2, 3.2.1

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-71032 Unrestricted file upload in Thelia allows PHP code executionPriority MEDIUM 40
    Show all 2 records →

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-109396
  2. 2026-10-12 Alias added: GHSA-w4v5-q3gm-mcf9
  3. 2026-10-13 CISA SSVC decision points changed
  4. 2026-10-13 Priority changed: LOW → MEDIUM

References

Patch 2

Advisory 1

Other 3

  • 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-2026-71005 Thelia translation editor flaws allow remote code execution CVSS 3.1HIGH 8.8
  • TI-2026-71032 Unrestricted file upload in Thelia allows PHP code execution CVSS 4.0HIGH 8.6
See all 18 →

Sources

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