CVE-2020-7734: Cabot Cross-Site Scripting Vulnerability

LOW
Advisory Identifier: GHSA-mqwh-r366-4224
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CVSS 8.2
CWE-79
Published
Advisory Summary

CVE-2020-7734 is a LOW (CVSS 8.2) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Cabot libraries in the PyPI ecosystem. The issue involves cabot cross site scripting (xss) vulnerability via endpoint column. Remediation is available in the latest vendor maintenance releases.

CVE-2020-7734 at a Glance

CVE Identifier CVE-2020-7734
GHSA Identifier GHSA-mqwh-r366-4224
Severity LOW
CVSS v3.1 Base Score 8.2
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Cabot
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2020-7734

To remediate this vulnerability, upgrade all affected Cabot dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

cabot fixed: Latest secure release 
pip install cabot>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show cabot

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2020-7734, inspect your installed packages using pip:

pip show cabot

Analyze the terminal output to locate any version of Cabot in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show cabot command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Cabot, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

All versions up to 0.11.16 of package cabot are vulnerable to Cross-site Scripting (XSS) via the Endpoint column.

CVE-2020-7734 Affected Cabot Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
cabot
pypi/cabot
PyPI
≤ 0.11.16

References

NVD — CVE-2020-7734 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7734
Cabot Source Repository REPOSITORY
https://github.com/arachnys/cabot/pull/694
Security Fix Commit FIX COMMIT
https://github.com/arachnys/cabot/commit/eb0b3544f8c8ab2dee4643df191da346a941734f
Cabot Source Repository REPOSITORY
https://github.com/arachnys/cabot
Cabot Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/cabot/PYSEC-2020-227.yaml
itsmeanonartist.tech/blogs/blog2.html WEB
https://itsmeanonartist.tech/blogs/blog2.html
snyk.io/vuln/snyk-python-ca... WEB
https://snyk.io/vuln/SNYK-PYTHON-CABOT-609862
www.exploit-db.com/exploits/48791 WEB
https://www.exploit-db.com/exploits/48791

Frequently Asked Questions

What is CVE-2020-7734?
CVE-2020-7734 is a security vulnerability in Cabot involving Cabot Cross Site Scripting (XSS) vulnerability via Endpoint column under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Cabot versions are affected?
Affected versions include releases prior to current release patches across affected packages: cabot.
What version fixes CVE-2020-7734?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is cabot affected?
Yes, cabot is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2020-7734?
CVE-2020-7734 has a CVSS v3.1 base score of 8.2 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L.
What CWE is associated with CVE-2020-7734?
CVE-2020-7734 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check PyPI dependencies for CVE-2020-7734?
Run the dependency tree command: 'pip show cabot'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mqwh-r366-4224",
  "modified" : "2024-09-13T15:56:14Z",
  "published" : "2022-05-24T17:29:11Z",
  "aliases" : [ "CVE-2020-7734" ],
  "summary" : "Cabot Cross Site Scripting (XSS) vulnerability via Endpoint column",
  "details" : "All versions up to 0.11.16 of package cabot are vulnerable to Cross-site Scripting (XSS) via the Endpoint column.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:L/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "cabot"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.11.16"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7734"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/arachnys/cabot/pull/694"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/arachnys/cabot/commit/eb0b3544f8c8ab2dee4643df191da346a941734f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/arachnys/cabot"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/cabot/PYSEC-2020-227.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://itsmeanonartist.tech/blogs/blog2.html"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-PYTHON-CABOT-609862"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/48791"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-04T21:48:39Z",
    "nvd_published_at" : "2020-09-22T08:15:00Z"
  }
}