Vulnerability · Published Jun 23, 2025 · Assigned by GovTech CSG
CVE-2025-52936Improper Link Resolution Before File Access vulnerability in yrutschle/sslh
Critical 9.3
In plain English
A critical-severity security flaw in sslh from yrutschle. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)0.2%top 90.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper Link Resolution Before File Access ('Link Following') vulnerability in yrutschle sslh.This issue affects sslh: before 2.2.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | sslh | 1.20-1+deb12u1 | DEBIAN-CVE-2025-52936 |
| Debian:13 | sslh | no fix listed | DEBIAN-CVE-2025-52936 |
| Debian:14 | sslh | 2.3.1-1 | DEBIAN-CVE-2025-52936 |
| Ubuntu:22.04:LTS | sslh | 1.20-1+deb11u1build0.22.04.1 | UBUNTU-CVE-2025-52936 |
| Ubuntu:22.04:LTS | sslh | 1.20-1+deb11u1build0.22.04.1 | USN-8360-1 |
| Ubuntu:25.10 | sslh | 2.1.4-1ubuntu0.25.10.1 | USN-8360-1 |
| Ubuntu:25.10 | sslh | 2.1.4-1ubuntu0.25.10.1 | UBUNTU-CVE-2025-52936 |
| Ubuntu:26.04:LTS | sslh | 2.1.4-1ubuntu0.26.04.1 | USN-8360-1 |
| Ubuntu:26.04:LTS | sslh | 2.1.4-1ubuntu0.26.04.1 | UBUNTU-CVE-2025-52936 |
| Ubuntu:26.10 | sslh | no fix listed | UBUNTU-CVE-2025-52936 |
Affected products (as reported)
Weakness: CWE-59 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/S:N/AU:Y/R:U/V:C/RE:M/U:Amber