Vulnerabilities in pkg:pypi/html-to-csv

PACKAGE
Advisory Identifier: GHSA-fwf6-rw69-hhj4
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Advisory Summary

CVE-2021-23654 is a MODERATE (CVSS 5.6) improper neutralization of formula elements vulnerability (CWE-1236: Improper Neutralization of Formula Elements in a CSV File) affecting Html to csv libraries in the PyPI ecosystem. The issue involves improper neutralization of formula elements in a csv file in html-2-csv. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/html-to-csv

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/html-to-csv. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-fwf6-rw69-hhj4 CVE-2021-23654 MODERATE Improper Neutralization of Formula Elements in a CSV File in html-2-csv

CVE-2021-23654 at a Glance

CVE Identifier CVE-2021-23654
GHSA Identifier GHSA-fwf6-rw69-hhj4
Severity MODERATE
CVSS v3.1 Base Score 5.6
CWE Classification CWE-1236: Improper Neutralization of Formula Elements in a CSV File
Affected Product Html to csv
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.6

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2021-23654

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

html-to-csv fixed: Latest secure release 
pip install html-to-csv>=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 html-to-csv

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2021-23654, inspect your installed packages using pip:

pip show html-to-csv

Analyze the terminal output to locate any version of Html to csv 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 html-to-csv command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1236: Improper Neutralization of Formula Elements in a CSV File, where the product saves user-provided information into a comma-separated value (csv) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product. In Html to csv, 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

This affects all versions of package html-to-csv. When there is a formula embedded in a HTML page, it gets accepted without any validation and the same would be pushed while converting it into a CSV file. Through this a malicious actor can embed or generate a malicious link or execute commands via CSV files.

CVE-2021-23654 Affected Html to csv Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
html-to-csv
pypi/html-to-csv
PyPI
≤ 0.1.3

References

NVD — CVE-2021-23654 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23654
Html to csv Source Repository REPOSITORY
https://github.com/hanwentao/html2csv/issues/9
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-fwf6-rw69-hhj4
Html to csv Source Repository REPOSITORY
https://github.com/hanwentao/html2csv
Html to csv Source Repository REPOSITORY
https://github.com/hanwentao/html2csv/blob/master/html2csv/converter.py
snyk.io/vuln/snyk-python-ht... WEB
https://snyk.io/vuln/SNYK-PYTHON-HTMLTOCSV-1582784
Html to csv Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/html-to-csv/PYSEC-2021-866.yaml

Frequently Asked Questions

What is CVE-2021-23654?
CVE-2021-23654 is a security vulnerability in Html to csv involving Improper Neutralization of Formula Elements in a CSV File in html-2-csv under CWE-1236: Improper Neutralization of Formula Elements in a CSV File.
Which Html to csv versions are affected?
Affected versions include releases prior to current release patches across affected packages: html-to-csv.
What version fixes CVE-2021-23654?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is html-to-csv affected?
Yes, html-to-csv 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-2021-23654?
CVE-2021-23654 has a CVSS v3.1 base score of 5.6 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2021-23654?
CVE-2021-23654 is classified under CWE-1236: Improper Neutralization of Formula Elements in a CSV File (The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product.).
How can I check PyPI dependencies for CVE-2021-23654?
Run the dependency tree command: 'pip show html-to-csv'. 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-fwf6-rw69-hhj4",
  "modified" : "2024-09-20T21:51:03Z",
  "published" : "2021-11-30T22:22:16Z",
  "aliases" : [ "CVE-2021-23654" ],
  "summary" : "Improper Neutralization of Formula Elements in a CSV File in html-2-csv",
  "details" : "This affects all versions of package html-to-csv. When there is a formula embedded in a HTML page, it gets accepted without any validation and the same would be pushed while converting it into a CSV file. Through this a malicious actor can embed or generate a malicious link or execute commands via CSV files.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "html-to-csv"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-23654"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hanwentao/html2csv/issues/9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-fwf6-rw69-hhj4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/hanwentao/html2csv"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hanwentao/html2csv/blob/master/html2csv/converter.py"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/html-to-csv/PYSEC-2021-866.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-PYTHON-HTMLTOCSV-1582784"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1236" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-11-29T20:28:01Z",
    "nvd_published_at" : "2021-11-26T20:15:00Z"
  }
}