Tendenci 12.3.1 contains a CSV formula injection vulnerability in the contact form message field that allows attackers to inject malicious formulas during export. Attackers can submit crafted payloads
Tendenci 12.3.1 contains a CSV formula injection vulnerability in the contact form message field that allows attackers to inject malicious formulas during export. Attackers can submit crafted payloads like '=10+20+cmd|' /C calc'!A0' in the message field to trigger arbitrary command execution when the CSV is opened in spreadsheet applications.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | tendenci | <= 12.3.1 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-36962
- https://github.com/tendenci/tendenci/commit/3e37622cac81440c5a1f97c39f112a2cf4a5450c
- https://github.com/pypa/advisory-database/tree/main/vulns/tendenci/PYSEC-2026-136.yaml
- https://github.com/tendenci/tendenci
- https://www.exploit-db.com/exploits/49145
- https://www.tendenci.com
- https://www.vulncheck.com/advisories/tendenci-csv-formula-injection
- https://www.tendenci.com/
- https://github.com/advisories/GHSA-4q3w-jgfx-4792
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X- Weakness (CWE)
CWE-1236- Platform
- Python (PyPI)
- Package
tendenci- Disclosed
- 28.01.2026
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4q3w-jgfx-4792 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-136 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: tendenci
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 06.2020 02.2026
- Without a fix
- 3
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- Medium 4
Disclosures per year
- 2020: 1
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 4
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Tendenci 12.3.1 contains a CSV formula injection vulnerability in the contact form message field that allows attackers to inject malicious formulas during export. Attackers can submit crafted payloads this entry
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