CVE-2026-59167 json
SunEditor: Critical XSS vulnerability - sanitizer bypass
published 2026-09-23 47 d ago modified 2026-09-24 45 d ago also GHSA-6rf4-v2fh-m6p4 , EUVD-2026-85324
- cvss
- 10.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 2.47.11, the sanitizer in src/lib/core.js does not consistently reject namespaced or custom HTML elements, allowing event-handler attributes to remain on crafted elements. When an application renders attacker-controlled editor content and a user interacts with the element, the retained handler can execute script in the application's browser origin, enabling stored cross-site scripting, data exposure, or unauthorized browser-context actions. This issue is fixed in version 2.47.11.
Patch / fix
- npm suneditor 2.47.11
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 46 d ago
Exploit prediction
0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | suneditor | <2.47.11 |
2.47.11 |
Affected products
- JiHong88 suneditor
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045
web
-
github.com
/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4
exploit, web
-
github.com
/JiHong88/suneditor/issues/1646
web
-
github.com
/JiHong88/suneditor/releases/tag/2.47.11
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-59167
advisory
-
github.com
/JiHong88/suneditor
package
Sources
- CVE List CVE-2026-59167
- GitHub Advisory GHSA-6rf4-v2fh-m6p4
- NVD CVE-2026-59167
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