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Fencer Vulns
critical 9.3

CVE-2025-52936 json

Improper Link Resolution Before File Access vulnerability in yrutschle/sslh

published 2025-06-23 16 mo ago modified 2026-08-01 3 mo ago also EUVD-2025-28479

cvss
9.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

Improper Link Resolution Before File Access ('Link Following') vulnerability in yrutschle sslh.This issue affects sslh: before 2.2.2.

Patch / fix

  • sslh_project sslh 2.2.2
  • sslh Debian 12 1.20-1+deb12u1
  • sslh Debian 14 2.3.1-1

debian advisories DEBIAN-CVE-2025-52936

  • sslh Ubuntu 22.04 LTS 1.20-1+deb11u1build0.22.04.1
  • sslh Ubuntu 25.10 2.1.4-1ubuntu0.25.10.1
  • sslh Ubuntu 26.04 LTS 2.1.4-1ubuntu0.26.04.1
  • sslh Ubuntu Pro 16.04 LTS 1.17-2ubuntu0.1~esm1
  • sslh Ubuntu Pro 18.04 LTS 1.18-1ubuntu0.1~esm1
  • sslh Ubuntu Pro 24.04 LTS 1.22c-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2025-52936

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
16 mo ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 9.3 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
CNA 4.0 9.3 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Amber

Affected products

  • yrutschle sslh

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.