CVE-2024-29203 TinyMCE Cross-Site Scripting (XSS) vulnerability in handling iframes

2024-03-2613:23:53

CWE-79

GitHub_M

www.cve.org

tinymce

cross-site scripting

xss

iframe

security vulnerability

same-origin restrictions

4.3 Medium

CVSS3

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

4.8 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

TinyMCE is an open source rich text editor. A cross-site scripting (XSS) vulnerability was discovered in TinyMCE’s content insertion code. This allowed iframe elements containing malicious code to execute when inserted into the editor. These iframe elements are restricted in their permissions by same-origin browser protections, but could still trigger operations such as downloading of malicious assets. This vulnerability is fixed in 6.8.1.

CNA Affected

[
  {
    "vendor": "tinymce",
    "product": "tinymce",
    "versions": [
      {
        "version": "< 6.8.1",
        "status": "affected"
      }
    ]
  }
]

References

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