PT-2021-17921 · Unknown · Qiita::Markdown

Ryotak · Published 2021-03-18 · Updated 2021-12-08 · CVE-2021-28796

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: Qiita::Markdown versions prior to 0.33.0

Description: The issue allows for XSS in transformers. There is no information provided about the estimated number of potentially affected devices worldwide or details about real-world incidents where this issue was exploited.

Recommendations: For versions prior to 0.33.0, update to version 0.33.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of transformers in Qiita::Markdown until a patch is available.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-28796

GHSA-F2C9-5JQW-3XH3

Affected Products

Qiita::Markdown

References · 10

• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/qiita-markdown/CVE-2021-28796.yml · Exploit
• https://github.com/increments/qiita-markdown/compare/v0.32.0...v0.33.0 · Patch
• https://osv.dev/vulnerability/GHSA-f2c9-5jqw-3xh3 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-28796 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-28796 · Security Note
• https://github.com/increments/qiita-markdown · Note
• https://vuln.ryotak.me/advisories/15 · Note
• https://t.me/cvenotify/12628 · Telegram Post
• https://t.me/cibsecurity/25119 · Telegram Post
• https://github.com/advisories/GHSA-f2c9-5jqw-3xh3 · Note