CVE-2025-59028
7.5
HIGH
CVSS 3.1
EPSS 0.09%
Description
When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in login processes (heavy perfomance penalty on large deployments). No publicly available exploits are known.
How to fix CVE-2025-59028
To remediate CVE-2025-59028, upgrade the affected package to a fixed version below.
- —upgrade to 2.4.3-r0 or later
- —upgrade to 1:2.4.1+dfsg1-6+deb13u4 or later
Is CVE-2025-59028 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.4.3-r0
- from 0, < 1:2.4.1+dfsg1-6+deb13u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |