CVE-2020-28455
Cross-site Scripting (XSS)
This affects all versions of package markdown-it-toc. The title of the generated toc and the contents of the header are not escaped.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Cross-site Scripting (XSS)
This affects all versions of package markdown-it-toc. The title of the generated toc and the contents of the header are not escaped.
- Record
CVE-2020-28455- CVSS 3.1
- 7.3 High
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 - Updated
- 2026-11-02
EUVDEUVD-2022-6435
This affects all versions of package markdown-it-toc. The title of the generated toc and the contents of the header are not escaped.
- Record
EUVD-2022-6435- CVSS 3.1
- 7.3 High
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 - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wfvx-fx73-3rfj
markdown-it-toc Cross-site Scripting due to title of generated toc and contents of header not being escaped
This affects all versions of package markdown-it-toc. The title of the generated toc and the contents of the header are not escaped.
- Record
GHSA-wfvx-fx73-3rfj- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
This affects all versions of package markdown-it-toc. The title of the generated toc and the contents of the header are not escaped.
- Record
CVE-2020-28455- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVGHSA-wfvx-fx73-3rfj
markdown-it-toc Cross-site Scripting due to title of generated toc and contents of header not being escaped
This affects all versions of package markdown-it-toc. The title of the generated toc and the contents of the header are not escaped.
- Record
GHSA-wfvx-fx73-3rfj- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
markdown-it-tocnpm |
through 1.1.0 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28455 is a high vulnerability (CVSS 7.3) in Markdown-it-toc Project Markdown-it-toc, published July 25, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.61%, the 49th percentile. No source names a fixed version.