CVE-2026-47762
Analyzed Analyzed - Analysis Complete

Stored XSS in TinyMCE Rich Text Editor

Publication date: 2026-05-28

Last updated on: 2026-05-28

Assigner: GitHub, Inc.

Description
TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability via forged mce:protected comments. Allows attackers to bypass sanitization and inject scripts that execute when content is restored. Impacts users who utilize the protect option. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

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Meta Information

Published
2026-05-28
Last Modified
2026-05-28
Generated
2026-07-08
AI Q&A
2026-05-28
EPSS Evaluated
2026-07-06
NVD
CVE-2026-47762
EUVD
EUVD-2026-32923

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
tiny tinymce to 5.11.1 (exc)
tiny tinymce From 6.0.0 (inc) to 7.9.3 (exc)
tiny tinymce From 8.0.0 (inc) to 8.5.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 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.

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Mitigation Strategies

To mitigate this vulnerability, users should upgrade TinyMCE to the patched versions 5.11.1, 7.9.3, or 8.5.1, which include fixes that validate decoded `mce:protected` content against configured protect regex rules before restoration.

There is no official workaround available, so upgrading to the fixed versions is the recommended immediate step.

Executive Summary

This vulnerability is a stored Cross-Site Scripting (XSS) issue in TinyMCE, an open source rich text editor. It occurs in versions before 5.11.1, 7.9.3, and 8.5.1 and allows attackers to bypass sanitization by using forged mce:protected comments.

Attackers can inject malicious scripts that execute when the content is restored, impacting users who utilize the protect option in TinyMCE.

The vulnerability is fixed by validating decoded mce:protected content against configured protect regex rules before restoration.

Impact Analysis

This vulnerability can have a significant impact by allowing attackers to execute malicious scripts in the context of the affected application.

  • It can lead to unauthorized access to sensitive information (confidentiality impact).
  • It can compromise data integrity by allowing attackers to manipulate content.
  • The vulnerability has a high severity rating with a CVSS score of 8.7, indicating a serious risk.
Compliance Impact

The vulnerability is a stored cross-site scripting (XSS) issue that allows attackers to inject malicious scripts, potentially compromising the confidentiality and integrity of data handled by TinyMCE.

Such a compromise could impact compliance with data protection standards and regulations like GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access and data breaches.

By allowing script injection and execution, this vulnerability could lead to unauthorized data exposure or manipulation, thereby violating these regulatory requirements.

Mitigation requires upgrading to patched versions of TinyMCE (5.11.1, 7.9.3, or 8.5.1) to prevent exploitation and help maintain compliance.

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