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CVE-2020-26307— GHSL-2020-301: Regular Expression Denial of Service (ReDoS) in HTML2Markdown

Quick assessment

Affected
kates html2markdown
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HTML2Markdown是Kates Gasis个人开发者的一个用于将 HTML 转换为 Markdown 文本的 Javascript 实现。 HTML2Markdown存在安全漏洞，该漏洞源于包含一个或多个易受正则表达式拒绝服务攻击的正则表达式。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.41% · P34

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2020-26307

Vulnerability Information
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Vulnerability Title
GHSL-2020-301: Regular Expression Denial of Service (ReDoS) in HTML2Markdown
Source: CVE Program / CVE List V5
Vulnerability Description
HTML2Markdown is a Javascript implementation for converting HTML to Markdown text. All available versions contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
HTML2Markdown 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HTML2Markdown是Kates Gasis个人开发者的一个用于将 HTML 转换为 Markdown 文本的 Javascript 实现。 HTML2Markdown存在安全漏洞，该漏洞源于包含一个或多个易受正则表达式拒绝服务攻击的正则表达式。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kates html2markdown 0 ~ 1.0.2 -

II. Public POCs for CVE-2020-26307

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III. Intelligence Information for CVE-2020-26307

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IV. Related Vulnerabilities

Same weakness: CWE-1333