Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apostrophecms | Sanitize-Html | < 2.3.1 |
References
- https://advisory.checkmarx.net/advisory/CX-2021-4308ExploitThird Party Advisory
- https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#231-2021-0Release NotesThird Party Advisory
- https://github.com/apostrophecms/sanitize-html/pull/458PatchThird Party Advisory
- https://advisory.checkmarx.net/advisory/CX-2021-4308ExploitThird Party Advisory
- https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#231-2021-0Release NotesThird Party Advisory
- https://github.com/apostrophecms/sanitize-html/pull/458PatchThird Party Advisory
FAQ
What is CVE-2021-26539?
CVE-2021-26539 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 "allowe...
How severe is CVE-2021-26539?
CVE-2021-26539 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-26539?
Check the references section above for vendor advisories and patch information. Affected products include: Apostrophecms Sanitize-Html.