CVE-2020-27511

Public Exploit

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.

7.5

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 1.24% Top 25%

Vendor Advisory prototypejs.org

Affected: n/a n/a

References

Link	Tags
http://prototypejs.org/	vendor advisory
https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283	third party advisory exploit
https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md	third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-27511?: CVE-2020-27511 has been scored as a high severity vulnerability.
How to fix CVE-2020-27511?: To fix CVE-2020-27511, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-27511 being actively exploited in the wild?: It is possible that CVE-2020-27511 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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