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CVE-2020-28455

21
FAUCET Score

CVE-2020-28455 is a medium-severity cross-site scripting (XSS) vulnerability affecting all versions of the markdown-it-toc package, where unescaped content in generated table of contents titles and header contents allows for injection attacks. It has a CVSS score of 6.1, indicating it can be exploited remotely with low attack complexity, requiring user interaction, and potentially leading to low impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:markdown-it-toc_project:markdown-it-toc:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 47th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-wfvx-fx73-3rfjmedium

markdown-it-toc Cross-site Scripting due to title of generated toc and contents of header not being escaped

Jul 26, 2022

References

security.snyk.io / vuln/SNYK-JS-MARKDOWNITTOC-1044067
ExploitThird Party Advisory