CVE-2022-23494 — Cross-site scripting vulnerability in TinyMCE —...

MEDIUM

Cross-site scripting vulnerability in TinyMCE alerts

Published December 8, 2022Updated November 8, 2023Source: osv

Summary

### Impact A cross-site scripting (XSS) vulnerability was discovered in the alert and confirm dialogs when these dialogs were provided with malicious HTML content. This can occur in plugins that use the alert or confirm dialogs, such as in the `image` plugin, which presents these dialogs when certain errors occur. The vulnerability allowed arbitrary JavaScript execution when an alert presented in the TinyMCE UI for the current user. ### Patches This vulnerability has been patched in TinyMCE 5.10.7 and TinyMCE 6.3.1 by ensuring HTML sanitization was still performed after unwrapping invalid elements. ### Fix To avoid this vulnerability: - Upgrade to TinyMCE 5.10.7 or higher for TinyMCE 5.x. - Upgrade to TinyMCE 6.3.1 or higher for TinyMCE 6.x. ### Workaround To reduce the impact of this vulnerability: - Ensure the the `images_upload_handler` returns a valid value as per the images_upload_handler documentation. ### References - https://www.tiny.cloud/docs/release-notes/release-notes5107/#securityfixes - https://www.tiny.cloud/docs/tinymce/6/6.3-release-notes/#security-fixes ### For more information If you have any questions or comments about this advisory: * Email us at [infosec@tiny.cloud](mailto:infosec@tiny.cloud) * Open an issue in the [TinyMCE repo](https://github.com/tinymce/tinymce/issues)

Advisory Timeline

First published December 8, 2022 (1403 days ago).
Last revised November 8, 2023 — 334 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update TinyMCE to 5.10.7 or later

dotnet add package TinyMCE --version 5.10.7

Composer

Update tinymce/tinymce to 6.3.1 or later

composer require "tinymce/tinymce:^6.3.1"

NuGet

Update TinyMCE to 6.3.1 or later

dotnet add package TinyMCE --version 6.3.1

Composer

Update tinymce/tinymce to 5.10.7 or later

composer require "tinymce/tinymce:^5.10.7"

npm

Update tinymce to 5.10.7 or later

npm install tinymce@5.10.7

npm

Update tinymce to 6.3.1 or later

npm install tinymce@6.3.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (6)

Affects 3 ecosystems: npm (1), nuget (1), packagist (1).

Package	Ecosystem	Affected	Fixed In
TinyMCE	nuget	3.4.3.2, 3.4.4, 3.4.5, 3.4.7 (+175 more)	5.10.7
tinymce/tinymce	packagist	6.0.0, 6.0.1, 6.0.2, 6.0.3 (+5 more)	6.3.1
TinyMCE	nuget	6.0.0, 6.0.1, 6.0.2, 6.0.3 (+5 more)	6.3.1
tinymce/tinymce	packagist	4.0.0, 4.0.1, 4.0.10, 4.0.11 (+166 more)	5.10.7
tinymce	npm	All versions	5.10.7
tinymce	npm	All versions	6.3.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-79
Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 5.4 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

Frequently Asked Questions

What is CVE-2022-23494?: Cross-site scripting vulnerability in TinyMCE alerts This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 5.4/10).
How do I check if my project is affected by CVE-2022-23494?: CVE-2022-23494 affects TinyMCE, tinymce/tinymce and tinymce. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2022-23494 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

5.4

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-gg8r-xjwq-4w92

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