6.1

CVE-2020-26870: cure53 dompurify Cross-site Scripting

CVSS: 6.1v3.1MediumModified
AliasesUBUNTU-CVE-2020-26870GHSA-63q7-h895-m982
Published 07-10-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-26870 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in cure53 dompurify. EPSS estimates a 4.88% chance of exploitation in the next 30 days, higher than 91.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
4.88%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 1
DLA-2419-1

Timeline

  1. 07-10-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

4.88%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

0.00 pp

From 4.88% on 18-09-2026

18-09-202618-10-2026
EPSS score
4.88%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (research.securitum.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Microsoft2 products
Cure531 product
Debian1 product
Npm1 product
  • dompurify< 2.0.17
Oracle1 product
Ubuntu1 product
  • dompurify.jsAll versions (No fix recorded)

6 vendors · 7 products

References

12 links
Show all 12 references