CVE-2021-27964 is a critical unauthenticated arbitrary file upload vulnerability affecting SonLogger versions prior to 6.4.1. Attackers can exploit this by sending a POST request to /Config/SaveUploadedHotspotLogoFile without authentication, allowing them to upload any file type due to a lack of extension or content validation. This vulnerability carries a CVSS score of 9.8, indicating a high potential for complete compromise of confidentiality, integrity, and availability. While not currently on the KEV catalog, public exploit code, including a Metasploit module, is available, and Nuclei templates exist for detection, though there is minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.4.1CPE matchmatch criteria | cpe:2.3:a:sfcyazilim:sonlogger:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.