GHSA-4Q3W-JGFX-4792

Vulnerability from github – Published: 2026-01-28 18:30 – Updated: 2026-06-09 20:50
VLAI
Summary
Tendenci is Vulnerable to CSV Formula Injection through its Contact Form Message Field
Details

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.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3 (Medium)
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
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "tendenci"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-36962"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1236"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-09T20:50:33Z",
    "nvd_published_at": "2026-01-28T18:16:46Z",
    "severity": "MODERATE"
  },
  "details": "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 \u0027=10+20+cmd|\u0027 /C calc\u0027!A0\u0027 in the message field to trigger arbitrary command execution when the CSV is opened in spreadsheet applications.",
  "id": "GHSA-4q3w-jgfx-4792",
  "modified": "2026-06-09T20:50:33Z",
  "published": "2026-01-28T18:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36962"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tendenci/tendenci/commit/3e37622cac81440c5a1f97c39f112a2cf4a5450c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/tendenci/PYSEC-2026-136.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tendenci/tendenci"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49145"
    },
    {
      "type": "WEB",
      "url": "https://www.tendenci.com"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/tendenci-csv-formula-injection"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Tendenci is Vulnerable to CSV Formula Injection through its Contact Form Message Field "
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.