GHSA-vrv8-v4w8-f95h

Source

https://github.com/advisories/GHSA-vrv8-v4w8-f95h

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/08/GHSA-vrv8-v4w8-f95h/GHSA-vrv8-v4w8-f95h.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-vrv8-v4w8-f95h

Aliases

CVE-2020-12648

Published

2020-08-11T14:55:01Z

Modified

2023-11-08T04:02:10.978052Z

Severity

6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator

Summary

Cross-site scripting vulnerability in TinyMCE

Details

Impact

A cross-site scripting (XSS) vulnerability was discovered in the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor via the clipboard or APIs. This impacts all users who are using TinyMCE 4.9.10 or lower and TinyMCE 5.4.0 or lower.

Patches

This vulnerability has been patched in TinyMCE 4.9.11 and 5.4.1 by improved HTML parsing and sanitization logic.

Workarounds

The workarounds available are: - upgrade to either TinyMCE 4.9.11 or TinyMCE 5.4.1 or - enable the media plugin, which overrides the default parsing behaviour for iframes or - add the following workaround to update the parsing schema rules for iframes:

Example: Change the default schema for iframes

setup: function(editor) {
  editor.on('PreInit', function() {
    editor.schema.getSpecialElements()['iframe'] = /&lt;/iframe[^>]*>/gi;
  });
}

Acknowledgements

Tiny Technologies would like to thank George Steketee and Chris Davis at Bishop Fox for discovering this vulnerability.

References

https://www.tiny.cloud/docs/release-notes/release-notes54/#securityfixes

For more information

If you have any questions or comments about this advisory: * Open an issue in the TinyMCE repo * Email us at infosec@tiny.cloud

Database specific

{
    "nvd_published_at": "2020-08-14T14:15:00Z",
    "cwe_ids": [
        "CWE-79"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-10T22:39:05Z"
}

References

Affected packages

npm / tinymce

Package

Name: tinymce; View open source insights on deps.dev
Purl: pkg:npm/tinymce

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.9.11