Vulnerability CVE-2020-27511
Published: 2021-06-21

Description:
An issue was discovered in the stripTags and unescapeHTML components in Prototype 1.7.3 version 1.6 and below where an attacker can cause a Regular Expression Denial of Service (ReDOS) through stripping crafted HTML tags.

Type:

NVD-CWE-noinfo

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Prototypejs -> Prototype 

 References:
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
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