6.3

CVE-2025-53859

NGINX ngx_mail_smtp_module vulnerability

NGINX Open Source and NGINX Plus have a vulnerability in the ngx_mail_smtp_module that might allow an unauthenticated attacker to over-read NGINX SMTP authentication process memory; as a result, the server side may leak arbitrary bytes sent in a request to the authentication server. This issue happens during the NGINX SMTP authentication process and requires the attacker to make preparations against the target system to extract the leaked data. The issue affects NGINX only if (1) it is built with the ngx_mail_smtp_module, (2) the smtp_auth directive is configured with method "none," and (3) the authentication server returns the "Auth-Wait" response header.




Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
F5 ≫ Nginx Plus Version r30 Update -
F5 ≫ Nginx Plus Version r31 Update -
F5 ≫ Nginx Plus Version r32 Update -
F5 ≫ Nginx Plus Version r32 Update p1
F5 ≫ Nginx Plus Version r32 Update p2
F5 ≫ Nginx Plus Version r33 Update -
F5 ≫ Nginx Plus Version r33 Update p1
F5 ≫ Nginx Plus Version r33 Update p2
F5 ≫ Nginx Plus Version r34 Update -
F5 ≫ Nginx Plus Version r34 Update p1
F5 ≫ Nginx Open Source Version >= 0.7.22 < 1.29.1
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.39% 0.315
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
F5 6.3 0 0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/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:X/AU:X/R:X/V:X/RE:X/U:X
F5 3.7 2.2 1.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

https://my.f5.com/manage/s/article/K000152786
Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/08/13/5