6.1
MEDIUM
CVE-2023-45818
TinyMCE DOMParser XSS Attack
Description

TinyMCE is an open source rich text editor. A mutation cross-site scripting (mXSS) vulnerability was discovered in TinyMCE’s core undo and redo functionality. When a carefully-crafted HTML snippet passes the XSS sanitisation layer, it is manipulated as a string by internal trimming functions before being stored in the undo stack. If the HTML snippet is restored from the undo stack, the combination of the string manipulation and reparative parsing by either the browser's native [DOMParser API](https://developer.mozilla.org/en-US/docs/Web/API/DOMParser) (TinyMCE 6) or the SaxParser API (TinyMCE 5) mutates the HTML maliciously, allowing an XSS payload to be executed. This vulnerability has been patched in TinyMCE 5.10.8 and TinyMCE 6.7.1 by ensuring HTML is trimmed using node-level manipulation instead of string manipulation. Users are advised to upgrade. There are no known workarounds for this vulnerability.

INFO

Published Date :

Oct. 19, 2023, 10:15 p.m.

Last Modified :

Oct. 26, 2023, 4:32 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

2.7

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2023-45818 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Tiny tinymce
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-45818.

URL Resource
https://github.com/tinymce/tinymce/security/advisories/GHSA-v65r-p3vv-jjfv Vendor Advisory
https://researchgate.net/publication/266654651_mXSS_attacks_Attacking_well-secured_web-applications_by_using_innerHTML_mutations Third Party Advisory
https://tiny.cloud/docs/release-notes/release-notes5108/#securityfixes Release Notes
https://tiny.cloud/docs/tinymce/6/6.7.1-release-notes/#security-fixes Release Notes
https://www.tiny.cloud/docs/api/tinymce.html/tinymce.html.saxparser/ Product

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-45818 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-45818 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Oct. 26, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    Changed Reference Type https://github.com/tinymce/tinymce/security/advisories/GHSA-v65r-p3vv-jjfv No Types Assigned https://github.com/tinymce/tinymce/security/advisories/GHSA-v65r-p3vv-jjfv Vendor Advisory
    Changed Reference Type https://researchgate.net/publication/266654651_mXSS_attacks_Attacking_well-secured_web-applications_by_using_innerHTML_mutations No Types Assigned https://researchgate.net/publication/266654651_mXSS_attacks_Attacking_well-secured_web-applications_by_using_innerHTML_mutations Third Party Advisory
    Changed Reference Type https://tiny.cloud/docs/release-notes/release-notes5108/#securityfixes No Types Assigned https://tiny.cloud/docs/release-notes/release-notes5108/#securityfixes Release Notes
    Changed Reference Type https://tiny.cloud/docs/tinymce/6/6.7.1-release-notes/#security-fixes No Types Assigned https://tiny.cloud/docs/tinymce/6/6.7.1-release-notes/#security-fixes Release Notes
    Changed Reference Type https://www.tiny.cloud/docs/api/tinymce.html/tinymce.html.saxparser/ No Types Assigned https://www.tiny.cloud/docs/api/tinymce.html/tinymce.html.saxparser/ Product
    Added CWE NIST CWE-79
    Added CPE Configuration OR *cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:* versions up to (excluding) 5.10.8 *cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.7.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-45818 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-45818 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.02%

score

0.35637

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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