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CVE-2018-1000162

Good to know:

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Date: April 18, 2018

Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in `setMarkupEscaped` for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.

Language: PHP

Severity Score

Related Resources (6)

https://github.com/erusev/parsedown/pull/495
https://github.com/Roave/SecurityAdvisories/issues/44#issuecomment-368594409
https://github.com/erusev/parsedown
https://nvd.nist.gov/vuln/detail/CVE-2018-1000162
https://github.com/FriendsOfPHP/security-advisories/blob/master/erusev/parsedown/CVE-2018-1000162.yaml
https://www.mend.io/vulnerability-database/CVE-2018-1000162

Severity Score

Weakness Type (CWE)

Cross-Site Scripting (XSS)

CWE-79

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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