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CVE-2020-36962: Tendenci is Vulnerable to CSV Formula Injection through its Contact Form Message Field

January 28, 2026 (updated June 9, 2026)

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.

References

  • github.com/advisories/GHSA-4q3w-jgfx-4792
  • github.com/pypa/advisory-database/tree/main/vulns/tendenci/PYSEC-2026-136.yaml
  • github.com/tendenci/tendenci
  • github.com/tendenci/tendenci/commit/3e37622cac81440c5a1f97c39f112a2cf4a5450c
  • nvd.nist.gov/vuln/detail/CVE-2020-36962
  • www.exploit-db.com/exploits/49145
  • www.tendenci.com/
  • www.vulncheck.com/advisories/tendenci-csv-formula-injection

Code Behaviors & Features

Detect and mitigate CVE-2020-36962 with GitLab Dependency Scanning

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Affected versions

All versions before 12.3.2

Fixed versions

  • 12.3.2

Solution

Upgrade to version 12.3.2 or above.

Impact 9.8 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-1236: Improper Neutralization of Formula Elements in a CSV File

Source file

pypi/tendenci/CVE-2020-36962.yml

Spotted a mistake? Edit the file on GitLab.

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