CVE-2020-27511

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    CVE-2020-27511

    Published: 21 Jun 2021Last Modified: 8 Jul 2026

    Summary:

    Details: 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.

    References: http://prototypejs.org/, https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283, https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 2a2fc85322b4715a9513c596e3131690125ab6e2
    Fixed -None

    Affected versions

    1.7.3

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2020-27511 | CVE-DB