CVE-2020-27511 — HIGH (7.5)

Vulnerability Description

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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Prototypejs	Prototype	1.7.3

References

http://prototypejs.org/Vendor Advisory
https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011ExploitThird Party Advisory
https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.mdExploitThird Party Advisory
http://prototypejs.org/Vendor Advisory
https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011ExploitThird Party Advisory
https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.mdExploitThird Party Advisory

FAQ

What is CVE-2020-27511?

CVE-2020-27511 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.

How severe is CVE-2020-27511?

CVE-2020-27511 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-27511?

Check the references section above for vendor advisories and patch information. Affected products include: Prototypejs Prototype.