CVE-2020-36962 | Tendenci 12.3.1 contains a CSV formula injection vulnerabili… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2020-36962
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-01-27 15:47 UTC
Published: 2026-01-28 17:35 UTC
Last updated: 2026-03-05 01:27 UTC
Primary CWE: CWE-1236
Improper Neutralization of Formula Elements in a CSV File
Vendor / Product: Tendenci / Tendenci
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Tendenci	Tendenci	—	12.3.1

Weakness (CWE)

CWE	Source	Description
CWE-1236	cna	Improper Neutralization of Formula Elements in a CSV File

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3	MEDIUM	4.0	cna	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

References (4)

ExploitDB-49145 https://www.exploit-db.com/exploits/49145
Official Vendor Homepage https://www.tendenci.com/
Tendenci GitHub Repository https://github.com/tendenci/tendenci
VulnCheck Advisory: Tendenci 12.3.1 - CSV/ Formula Injection https://www.vulncheck.com/advisories/tendenci-csv-formula-injection