CVE-2021-26539
MediumPublic PoC
Published: 08 February 2021
Published
08 February 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score
0.0029
52.6th percentile
Risk Priority
11
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-26539 is a medium-severity an unspecified weakness vulnerability in Apostrophecms Sanitize-Html. Its CVSS base score is 5.3 (Medium).
Operationally, ranked in the top 47.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-1183
Vulnerability details
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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
apostrophecms
sanitize-html
≤ 2.3.1
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.