XSS in Tiny Tinymce
CVE-2022-23494
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.010 (60.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.000
Affected products
- Tiny Tinymce
- Tinymce — versions < 5.10.7, >= 6.0.0, < 6.3.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/tinymce/tinymce/security/advisories/GHSA-gg8r-xjwq-4w92 (Patch, Third Party Advisory)
- github.com/tinymce/tinymce/commit/6923d85eba6de3e08ebc9c5a387b5abdaa21150e (Patch, Third Party Advisory)
- github.com/tinymce/tinymce/commit/8bb2d2646d4e1a718fce61a775fa22e9d317b32d (Patch, Third Party Advisory)
- www.tiny.cloud/docs/release-notes/release-notes5107/ (Release Notes, Vendor Advisory)
- www.tiny.cloud/docs/tinymce/6/6.3-release-notes/ (Release Notes, Vendor Advisory)
- www.tiny.cloud/docs/tinymce/6/file-image-upload/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2022-23494?
- CVE-2022-23494 is a medium-severity vulnerability in Tiny Tinymce, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-12-08.
- How severe is CVE-2022-23494?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2022-23494 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.