CVE-2021-26539 is a medium-severity vulnerability affecting Apostrophe Technologies' sanitize-html library prior to version 2.3.1. It allows an attacker to bypass hostname whitelist validation, specifically the "allowedIframeHostnames" option, by exploiting improper handling of internationalized domain names (IDNs). The vulnerability has a CVSS score of 5.3, indicating a network-based attack with low complexity and a potential impact on integrity, but no confidentiality or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.3.1CPE matchmatch criteria | cpe:2.3:a:apostrophecms:sanitize-html:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.