CVE-2024-38356: XSS (CVSS 6.1)

Description

TinyMCE is an open source rich text editor. A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content extraction code. When using the `noneditable_regexp` option, specially crafted HTML attributes containing malicious code were able to be executed when content was extracted from the editor. This vulnerability has been patched in TinyMCE 7.2.0, TinyMCE 6.8.4 and TinyMCE 5.11.0 LTS by ensuring that, when using the `noneditable_regexp` option, any content within an attribute is properly verified to match the configured regular expression before being added. Users are advised to upgrade. There are no known workarounds for this vulnerability.

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CVSS v3.1 Score

6.1

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

References

Other References

https://github.com/tinymce/tinymce/commit/5acb741665a98e83d62b91713c800abbff43b00d https://github.com/tinymce/tinymce/security/advisories/GHSA-9hcv-j9pv-qmph https://owasp.org/www-community/attacks/xss https://www.tiny.cloud/docs/tinymce/6/6.8.4-release-notes/#overview https://www.tiny.cloud/docs/tinymce/7/7.2-release-notes/#overview https://github.com/tinymce/tinymce/commit/5acb741665a98e83d62b91713c800abbff43b00d https://github.com/tinymce/tinymce/security/advisories/GHSA-9hcv-j9pv-qmph https://owasp.org/www-community/attacks/xss https://www.tiny.cloud/docs/tinymce/6/6.8.4-release-notes/#overview https://www.tiny.cloud/docs/tinymce/7/7.2-release-notes/#overview

Frequently Asked Questions

What is CVE-2024-38356? +

TinyMCE is an open source rich text editor. A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content extraction code. When using the `noneditable_regexp` option, specially crafted HTML attributes containing malicious code were able to be executed when content was extracted from the editor. This vulnerability has been patched in TinyMCE 7.2.0, TinyMCE 6.8.4 and TinyMCE 5.11.0 LTS by ensuring that, when using the `noneditable_regexp` option, any content within an attribute is properly verified to match the configured regular expression before being added. Users are advised to upgrade. There are no known workarounds for this vulnerability. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2024-38356? +

CVE-2024-38356 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2024-38356? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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