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CVE-2022-23494

Cross-site scripting vulnerability in TinyMCE alerts

MEDIUM
6.1
CVSS Score
Published: December 8, 2022 at 09:29 PM UTC
Updated: June 17, 2026 at 04:30 AM UTC
2 products affected across 2 vendorsTinymceTinymce

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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

tinymce is an open source rich text editor. 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. 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. Users are advised to upgrade to either 5.10.7 or 6.3.1. Users unable to upgrade may ensure the the `images_upload_handler` returns a valid value as per the images_upload_handler documentation.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tinymce· Tiny
95%
v < 5.10.76.0.0 ≤ v < 6.3.1
Affected range stops below 5.10.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.1, so it looks safe — our inference, not a vendor statement
Tinymce· Tinymce
60%
v < 5.10.7v < 6.3.1
Affected range stops below 5.10.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.1, so it looks safe — our inference, not a vendor statement

References (6)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/tinymce/tinymce/commit/6923d85eba6de3e08ebc9c5a387b5abdaa21150e
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/tinymce/tinymce/commit/8bb2d2646d4e1a718fce61a775fa22e9d317b32d
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/tinymce/tinymce/security/advisories/GHSA-gg8r-xjwq-4w92
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://www.tiny.cloud/docs/release-notes/release-notes5107/#securityfixes
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://www.tiny.cloud/docs/tinymce/6/6.3-release-notes/#security-fixes
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.tiny.cloud/docs/tinymce/6/file-image-upload/#images_upload_handler

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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