F5 NGINX Open Source/NGINX Plus improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in F5 NGINX Open Source and NGINX Plus. Affected by this issue is some unknown functionality. The manipulation results in improper authentication. This vulnerability was named CVE-2025-23419. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in F5 NGINX Open Source and NGINX Plus (unknown version). Affected is an unknown code block. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality. CVE summarizes:

When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. This vulnerability arises when TLS Session Tickets https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_ticket_key are used and/or the SSL session cache https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_cache are used in the default server and the default server is performing client certificate authentication.   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

The weakness was presented by Juraj Somorovsky as K000149173. The advisory is shared for download at my.f5.com. This vulnerability is traded as CVE-2025-23419 since 01/22/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 216348 (Fedora 40 : nginx / nginx-mod-fancyindex / nginx-mod-modsecurity / etc (2025-016ed44ddc)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (216348) and EUVD (EUVD-2025-3168). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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License

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 216348
Nessus Name: Fedora 40 : nginx / nginx-mod-fancyindex / nginx-mod-modsecurity / etc (2025-016ed44ddc)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/22/2025 🔍
02/05/2025 +14 days 🔍
02/05/2025 +0 days 🔍
11/12/2025 +280 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K000149173
Researcher: Juraj Somorovsky
Status: Confirmed

CVE: CVE-2025-23419 (🔍)
GCVE (CVE): GCVE-0-2025-23419
GCVE (VulDB): GCVE-100-294768
EUVD: 🔍

Entryinfo

Created: 02/05/2025 19:39
Updated: 11/12/2025 18:42
Changes: 02/05/2025 19:39 (75), 02/15/2025 12:07 (2), 11/12/2025 17:03 (1), 11/12/2025 18:42 (1)
Complete: 🔍
Cache ID: 216:76B:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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