Cross-Site Scripting (XSS)

2024-04-0105:40:45

Veracode Vulnerability Database

sca.analysiscenter.veracode.com

cross-site scripting

tinymce

iframe

vulnerability

browser protections

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.4

Confidence

High

EPSS

Percentile

15.5%

JSON

TinyMCE is vulnerable to Cross-Site Scripting (XSS). The vulnerability is due to improper iframe restrictions, which allows an attacker add an iframe element with malicious code which will execute upon insertion. Note that malicious code will be sandboxed due to same-origin browser protections.

References

github.com/advisories/GHSA-438c-3975-5x3f

github.com/tinymce/tinymce/commit/bcdea2ad14e3c2cea40743fb48c63bba067ae6d1

github.com/tinymce/tinymce/security/advisories/GHSA-438c-3975-5x3f

www.tiny.cloud/docs/tinymce/6/6.8.1-release-notes/#new-convert_unsafe_embeds-option-that-controls-whether-object-and-embed-elements-will-be-converted-to-more-restrictive-alternatives-namely-img-for-image-mime-types-video-for-video-mime-types-audio-audio-mime-types-or-iframe-for-other-or-unspecified-mime-types

www.tiny.cloud/docs/tinymce/7/7.0-release-notes/#sandbox_iframes-editor-option-is-now-defaulted-to-true