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Fencer Vulns
medium 5.8

CVE-2022-31175 json

Cross-site scripting caused by the editor instance destroying process in ckeditor5

published 2022-08-03 4 y ago modified 2026-06-17 4 mo ago also GHSA-42wq-rch8-6f6j , EUVD-2022-6474

cvss
5.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

CKEditor 5 is a JavaScript rich text editor. A cross-site scripting vulnerability has been discovered affecting three optional CKEditor 5's packages in versions prior to 35.0.1. The vulnerability allowed to trigger a JavaScript code after fulfilling special conditions. The affected packages are `@ckeditor/ckeditor5-markdown-gfm`, `@ckeditor/ckeditor5-html-support`, and `@ckeditor/ckeditor5-html-embed`. The specific conditions are 1) Using one of the affected packages. In case of `ckeditor5-html-support` and `ckeditor5-html-embed`, additionally, it was required to use a configuration that allows unsafe markup inside the editor. 2) Destroying the editor instance and 3) Initializing the editor on an element and using an element other than `<textarea>` as a base. The root cause of the issue was a mechanism responsible for updating the source element with the markup coming from the CKEditor 5 data pipeline after destroying the editor. This vulnerability might affect a small percent of integrators that depend on dynamic editor initialization/destroy and use Markdown, General HTML Support or HTML embed features. The problem has been recognized and patched. The fix is available in version 35.0.1. There are no known workarounds for this issue.

Patch / fix

  • npm @ckeditor/ckeditor5-markdown-gfm 35.0.1
  • npm @ckeditor/ckeditor5-html-support 35.0.1
  • npm @ckeditor/ckeditor5-html-embed 35.0.1
  • ckeditor ckeditor5-html-embed 35.0.1
  • ckeditor ckeditor5-html-support 35.0.1
  • ckeditor ckeditor5-markdown-gfm 35.0.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
NVD 3.1 4.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 5.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
npm @ckeditor/ckeditor5-markdown-gfm
<35.0.1
35.0.1
npm @ckeditor/ckeditor5-html-support
<35.0.1
35.0.1
npm @ckeditor/ckeditor5-html-embed
<35.0.1
35.0.1

Affected products

  • ckeditor ckeditor5

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.