CVE-2021-26539: Input Validation
First published: Fri Jan 22 2021(Updated: )
Apostrophe Technologies sanitize-html before 2.3.1 does not properly handle internationalized domain name (IDN) which could allow an attacker to bypass hostname whitelist validation set by the "allowedIframeHostnames" option.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/sanitize-html | <2.3.1 | 2.3.1 |
| Apostrophecms Sanitize-html | <2.3.1 |
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Reference Links
- https://advisory.checkmarx.net/advisory/CX-2021-4308
- https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#231-2021-01-22
- https://github.com/apostrophecms/sanitize-html/pull/458
- https://access.redhat.com/errata/RHSA-2021:2438
- https://access.redhat.com/security/cve/cve-2021-26539
- https://access.redhat.com/errata/RHSA-2021:3759
- https://bugzilla.redhat.com/show_bug.cgi?id=1932362
- https://www.cve.org/CVERecord?id=CVE-2021-26539 https://nvd.nist.gov/vuln/detail/CVE-2021-26539
- https://access.redhat.com/errata/RHSA-2020:5633
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-26539.
What is the title of the vulnerability?
The title of the vulnerability is 'Apostrophe Technologies sanitize-html before 2.3.1 does not properly handle internationalized domain...'
What is the severity of CVE-2021-26539?
The severity of CVE-2021-26539 is medium with a severity value of 5.3.
What is the affected software for CVE-2021-26539?
The affected software for CVE-2021-26539 is Apostrophe Technologies sanitize-html before version 2.3.1.
How can the vulnerability be fixed?
To fix the vulnerability, upgrade to version 2.3.1 of Apostrophe Technologies sanitize-html.
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