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CVE-2020-28455
Cross-site Scripting (XSS)
High7.3EPSS 0.61%
- Published
- Updated
- Reserved
- Assigned by
- snyk
Description
This affects all versions of package markdown-it-toc. The title of the generated toc and the contents of the header are not escaped.
Timeline
ID reserved
By snyk
- 21 months later
· 21 months later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| snykCNA (assigner) | 3.1 | High7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:U/RC:C |
| NVDNVD · Modified | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.61% · top 50% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.
Weakness
- Cross-site Scripting (XSS)
- CWE-79 (opens in a new tab)All about CWE-79 and its CVEs
Affected products
markdown-it-toc
- affected < unspecified
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmmarkdown-it-tocGHSA-wfvx-fx73-3rfj (opens in a new tab)
References (1)
- https://security.snyk.io/vuln/SNYK-JS-MARKDOWNITTOC-1044067 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-wfvx-fx73-3rfj (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-28455)Record last updated .