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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWg2bXEtM2NqNi1oNzM4

Reverse Tabnabbing in showdown

Versions of showdown prior to 1.9.1 are vulnerable to Reverse Tabnabbing. The package uses target='_blank' in anchor tags, allowing attackers to access window.opener for the original page when opening links. This is commonly used for phishing attacks.

Recommendation

Upgrade to version 1.9.1 or later.

Permalink: https://github.com/advisories/GHSA-h6mq-3cj6-h738
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWg2bXEtM2NqNi1oNzM4
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: almost 4 years ago
Updated: over 1 year ago


CVSS Score: 3.1
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Identifiers: GHSA-h6mq-3cj6-h738
References: Repository: https://github.com/showdownjs/showdown
Blast Radius: 13.6

Affected Packages

npm:showdown
Dependent packages: 1,569
Dependent repositories: 25,009
Downloads: 2,907,365 last month
Affected Version Ranges: < 1.9.1
Fixed in: 1.9.1
All affected versions: 0.0.1, 0.1.0, 0.2.0, 0.3.0, 0.3.1, 0.3.4, 0.4.0, 0.5.0, 0.5.2, 0.5.3, 0.5.4, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.3.0, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.5.5, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 1.6.4, 1.7.0, 1.7.1, 1.7.2, 1.7.3, 1.7.4, 1.7.5, 1.7.6, 1.8.0, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.8.5, 1.8.6, 1.8.7, 1.9.0
All unaffected versions: 1.9.1, 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.1.0