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CVE-2020-27511

Date: June 21, 2021

An issue was discovered in the stripTags and unescapeHTML components in Prototype 1.7.3 where an attacker can cause a Regular Expression Denial of Service (ReDOS) through stripping crafted HTML tags.

Language: JS

Severity Score

Related Resources (6)

http://prototypejs.org/
https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md
https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283
https://nvd.nist.gov/vuln/detail/CVE-2020-27511
https://security-tracker.debian.org/tracker/CVE-2020-27511
https://www.mend.io/vulnerability-database/CVE-2020-27511

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

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

CVSS v2

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

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