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.

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Thelia Thelia unaffected
Version Status Constraints
0 affected < 3.1.2
3.2.0 affected < 3.2.1

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/Serializer/Serializer/CSVSerializer.php cve-icon cve-icon
https://github.com/thelia/thelia/commit/6e46059225d87565caf4859ec0f764354e82ce95 cve-icon cve-icon
https://github.com/thelia/thelia/commit/c00a26f0631ed9de3c4466176db6e808a25034aa cve-icon cve-icon
https://github.com/thelia/thelia/releases/tag/3.1.2 cve-icon cve-icon
https://github.com/thelia/thelia/releases/tag/3.2.1 cve-icon cve-icon
https://github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc cve-icon cve-icon
https://www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-before-3.2.1-csv-formula-injection-via-exports cve-icon cve-icon
History

Mon, 12 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Thelia before 3.1.2 and 3.2.x before 3.2.1 CSV Formula Injection via Exports
Weaknesses CWE-1236
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-12T15:16:41.909Z

Reserved: 2026-10-12T14:40:47.844Z

Link: CVE-2026-109396

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-12T16:17:05.077

Modified: 2026-10-12T16:17:05.077

Link: CVE-2026-109396

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T17:15:15Z

Weaknesses