CVEvulnerability
CVE-2020-27511
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-06-21
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
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.
Affected configurations
• prototypejs prototype 1.7.3
References
- http://prototypejs.org/ Vendor Advisory
- https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283 Exploit, Third Party Advisory
- https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md Exploit, Third Party Advisory
- http://prototypejs.org/ Vendor Advisory
- https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283 Exploit, Third Party Advisory
- https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md Exploit, Third Party Advisory