VulnerabilityModified
CVE-2021-26539
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.
MEDIUM 5.3EPSS 1.95%
Does this matter?
Lower severity and a low EPSS score (1.95%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 1.95% probability · 79th percentile
- CISA KEV
- Not listed
- Affected
- apostrophecms/sanitize-html
- Source
- cve@mitre.org
References
- https://advisory.checkmarx.net/advisory/CX-2021-4308Exploit, Third Party Advisory
- https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#231-2021-01-22Release Notes, Third Party Advisory
- https://github.com/apostrophecms/sanitize-html/pull/458Patch, Third Party Advisory
- https://advisory.checkmarx.net/advisory/CX-2021-4308Exploit, Third Party Advisory
- https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#231-2021-01-22Release Notes, Third Party Advisory
- https://github.com/apostrophecms/sanitize-html/pull/458Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.