NGINX ngx_mail_smtp_module vulnerability
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||
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| F5 | NGINX Plus | unknown |
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| F5 | NGINX Open Source | unknown |
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Configuration 1 [-]
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Configuration 2 [-]
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No data.
| Vendor | Product | Versions |
|---|---|---|
| F5 | Nginx Open Source | — |
| F5 | Nginx Plus | — |
| Nginx | Nginx | — |
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4589-1 | nginx security update |
EUVD |
EUVD-2025-24579 | 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. |
Ubuntu USN |
USN-7715-1 | nginx vulnerability |
Ubuntu USN |
USN-8375-1 | nginx vulnerabilities |
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.439% probability within 30 days)
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| References |
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| CPEs | cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r30:-:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r31:-:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:-:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:-:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r34:-:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:* |
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
F5
F5 nginx Open Source F5 nginx Plus Nginx Nginx nginx |
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| Vendors & Products |
F5
F5 nginx Open Source F5 nginx Plus Nginx Nginx nginx |
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| References |
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| Metrics |
threat_severity
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threat_severity
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| Metrics |
ssvc
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| Description | 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. | |
| Title | NGINX ngx_mail_smtp_module vulnerability | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
cvssV3_1
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