Vulnerability in Apostrophecms Sanitize-html
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.
EPSS: 0.020 (78.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Apostrophecms Sanitize-html
- N/a — versions n/a
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-26539?
- CVE-2021-26539 is a medium-severity vulnerability in Apostrophecms Sanitize-html. CVSS score: 5.3/10. Published 2021-02-08.
- How severe is CVE-2021-26539?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-26539 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.