CVE-2021-21266 is an XML External Entity (XXE) vulnerability affecting openHAB versions prior to 2.5.12 and 3.0.1, impacting numerous add-ons that parse external XML. Attackers on the same network can exploit this to retrieve internal file system information, with SSDP requests being a potential vector. The vulnerability has a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity and no user interaction, leading to low confidentiality impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.5.12CPE matchmatch criteria | cpe:2.3:a:openhab:openhab:*:*:*:*:*:*:*:* | ||
3.0.0CPE matchmatch criteria | cpe:2.3:a:openhab:openhab:3.0.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/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 0.1 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.