PT-2023-30737 · Tinymce · Tinymce

Masatokinugawa · Published 2023-11-15 · Updated 2023-11-22 · CVE-2023-48219

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions TinyMCE versions prior to 5.10.9 TinyMCE versions prior to 6.7.3

Description A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCE’s core undo/redo functionality and other APIs and plugins. Text nodes within specific parents are not escaped upon serialization according to the HTML standard. If such text nodes contain a special character reserved as an internal marker, they can be combined with other HTML patterns to form malicious snippets. These snippets pass the initial sanitisation layer when the content is parsed into the editor body, but can trigger XSS when the special internal marker is removed from the content and re-parsed. The vulnerability occurs when serialised HTML content is processed before being stored in the undo stack, or when the following APIs and plugins are used: tinymce.Editor.getContent({ format: 'raw' }), tinymce.Editor.resetContent(), and the Autosave Plugin.

Recommendations

• Upgrade to TinyMCE 5.10.9 or higher for TinyMCE 5.x.
• Upgrade to TinyMCE 6.7.3 or higher for TinyMCE 6.x.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-48219

GHSA-V626-R774-J7F8

Affected Products

Tinymce

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48219.json · Exploit
• https://github.com/tinymce/tinymce/security/advisories/GHSA-v626-r774-j7f8 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-48219 · Security Note
• https://osv.dev/vulnerability/CVE-2023-48219 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-48219 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-48219 · Security Note
• https://ubuntu.com/security/CVE-2023-48219 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-v626-r774-j7f8 · Vendor Advisory
• https://github.com/tinymce/tinymce/releases/tag/5.10.9 · Note
• https://github.com/tinymce/tinymce/releases/tag/6.7.3 · Note
• https://github.com/tinymce/tinymce · Note
• https://tiny.cloud/docs/release-notes/release-notes5109 · Note
• https://tiny.cloud/docs/tinymce/6/6.7.3-release-notes · Note
• https://t.me/pentestingnews/41127 · Telegram Post
• https://t.me/latest_high_impact_cve/94 · Telegram Post