Cure53 DOMPurify before 2.0.17 allows mutation XSS.
Priority LOW 35CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Cure53 DOMPurify before 2.0.17 allows mutation XSS. This occurs because a serialize-parse roundtrip does not necessarily return the original DOM tree, and a namespace can change from HTML to MathML, as demonstrated by nesting of FORM elements.
Why it matters now
EPSS 0.04881 92nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed dompurify (npm): 2.0.17
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | dompurify (npm) | before 2.0.17 | 2.0.17 | Patch available | GHSA-63q7-h895-m982 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- dompurify (npm) Vendor— Affected before 2.0.17 Fixed in 2.0.17 Patch available GHSA-63q7-h895-m982
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:* | before 2.0.17 | Vulnerable | cure53 |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:a:microsoft:visual_studio_2017:15.9:*:*:*:*:*:*:* | 15.9 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:visual_studio_2019:16.0:*:*:*:*:*:*:* | 16.0 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:visual_studio_2019:16.4:*:*:*:*:*:*:* | 16.4 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:visual_studio_2019:16.7:*:*:*:*:*:*:* | 16.7 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:* | 16.8 | Vulnerable | Microsoft |
| cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:* | before 21.1.0.00.01 | Vulnerable | Oracle |
- cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:* Versions before 2.0.17 Vulnerable ·cure53
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:a:microsoft:visual_studio_2017:15.9:*:*:*:*:*:*:* Versions 15.9 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:visual_studio_2019:16.0:*:*:*:*:*:*:* Versions 16.0 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:visual_studio_2019:16.4:*:*:*:*:*:*:* Versions 16.4 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:visual_studio_2019:16.7:*:*:*:*:*:*:* Versions 16.7 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:* Versions 16.8 Vulnerable ·Microsoft
- cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:* Versions before 21.1.0.00.01 Vulnerable ·Oracle
Remediation
- Fix · GHSA-63q7-h895-m982 dompurify (npm) Fixed in 2.0.17 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26870
- 2026-10-03 Alias added: GHSA-63q7-h895-m982
References
Patch 4
Advisory 2
Sources
- CVE-2020-26870 · CVE Program
- CVE-2020-26870 · NVD
- FIRST EPSS
- GHSA-63q7-h895-m982 · GitHub Advisory Database · CC BY 4.0
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