Vulnerability Monitor

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CVE-2020-27511

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.

Published

2021-06-21T20:15:08.160

Last Modified

2024-11-21T05:21:18.047

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	prototypejs	prototype	1.7.3	Yes

References

http://prototypejs.org/ Vendor Advisory ([email protected])
https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283 Exploit, Third Party Advisory ([email protected])
https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md Exploit, Third Party Advisory ([email protected])
http://prototypejs.org/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)