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Public proof of conceptFix available

CVE-2020-36962

Tendenci 12.3.1 - CSV/ Formula Injection

A public proof of concept exists; no exploitation attested.

  • Published2026-01-28
  • Fixed in12.3.2
  • WeaknessCWE-1236

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-01-2818:16CVE publishedNVD

Versions per branch

OSV · NVD
tendenci
BranchAffectedFixed in
12.3< 12.3.212.3.2
12.3≤ 12.3.1no fix published
Tendenci
BranchAffectedFixed in
12.3= 12.3.1no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Tendenci
    Affected
    • = 12.3.1no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-10-08

Fix

  1. Update tendenci to 12.3.2

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionpoc2026-01-28
  • CNACVSS 4.05.3known since 2026-10-23
  • CNACVSS 3.19.8known since 2026-10-23
  • CNAweakness (CWE)CWE-1236known since 2026-10-23
  • FIRST EPSSEPSS score12.4 %read 2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2026-06-09

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 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
Published
2026-01-28
Last Modified
2026-10-08
NVD status
Analyzed
GitHub Advisory
GHSA-4q3w-jgfx-4792

Frequently asked questions

What is CVE-2020-36962?

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.

Is CVE-2020-36962 actively exploited?

A proof-of-concept exploit exists for CVE-2020-36962, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2020-36962?

CVE-2020-36962 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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