CVE-2025-59028
Last modified
CVE-2025-59028 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Dovecot | Dovecot | < 2.4.3 |
| Open-Xchange | Dovecot | < 3.1.2 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-59028?
How severe is CVE-2025-59028?
How do I fix CVE-2025-59028?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-59021Backend users with access to the redirects module and write …6.4
- CVE-2025-59022Backend users who had access to the recycler module could de…8.1
- CVE-2025-59023Crafted delegations or IP fragments can poison cached delega…8.2
- CVE-2025-59024Crafted delegations or IP fragments can poison cached delega…6.5
- CVE-2025-59025Malicious e-mail content can be used to execute script code.…6.1
- CVE-2025-59026Malicious content uploaded as file can be used to execute sc…5.4
- CVE-2025-59029An attacker can trigger an assertion failure by requesting c…5.3
- CVE-2025-5903A vulnerability was found in TOTOLINK T10 4.1.8cu.5207. It h…8.8
- CVE-2025-59030An attacker can trigger the removal of cached records by sen…7.5
- CVE-2025-59031Dovecot has provided a script to use for attachment to text …4.3
- CVE-2025-59032ManageSieve AUTHENTICATE command crashes when using literal …7.5
- CVE-2025-59033The Microsoft vulnerable driver block list is implemented as…7.4
Are you affected by CVE-2025-59028?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST