PT-2021-11398 · Prototype+2 · Prototype+2

Published 2021-06-17 · Updated 2021-09-20 · CVE-2020-27511

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Prototype version 1.7.3

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

Recommendations: For Prototype version 1.7.3, consider updating to a newer version that addresses this issue, as using crafted HTML tags can lead to a Regular Expression Denial of Service (ReDOS). At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-185

Related Identifiers

BDU:2025-03939

CVE-2020-27511

Affected Products

Astra Linux

Debian

Prototype

References · 14

• 🔥 https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283 · Exploit
• 🔥 https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md · Exploit
• https://cve.org/CVERecord?id=CVE-2020-27511 · Security Note
• https://osv.dev/vulnerability/CVE-2020-27511 · Vendor Advisory
• http://prototypejs.org · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2025-0319SE17 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-27511 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-27511 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-27511 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-27511 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-27511 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-03939 · Security Note
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2025-0422SE63 · Vendor Advisory
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991898 · Note