5.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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CVE-2020-36962

CVE-2020-36962: Tendenci 12.3.1 - CSV/ Formula Injection

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.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2020-36962

CVE-2020-36962:

5.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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Technical Details

SSVC / BOD 26-04 ↗

Exploitation pocAutomatable YesTech Impact Partial

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Package Name	Ecosystem	Vulnerable Versions	First Patched Version
tendenci	pip	< 12.3.2	12.3.2

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability is a classic CSV formula injection. The application exports user-provided data to CSV files without sanitizing it first. An attacker can inject malicious formulas into fields that are later exported. When a user opens the exported CSV file in a spreadsheet program, the formula is executed. The vulnerability was not limited to the contact form, but was present in many export functions across the application. The patch introduces a new function, escape_csv, which sanitizes the data by prepending a single quote to any value that starts with a character that could be interpreted as a formula. This function is then called in all the export functions that were identified as vulnerable.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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