CVE-2023-27152Public exploitNetwork attack vector

Account access via unlimited login attempts

Published Oct 23, 2023 · Updated Sep 11, 2024

Improper authentication throttling in the DECISO OPNsense 23.1 login page allows remote attackers to gain account access by password guessing. The login page accepts more than 100 repeated username-and-password submissions without rate limiting or account lockout and continues testing each password. No prior account access or user interaction is required, but successful access still depends on guessing a valid password for a configured account.

CVSS severity9.8
Critical
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication throttling in the DECISO OPNsense 23.1 login page allows remote attackers to gain account access by password guessing. The login page accepts more than 100 repeated username-and-password submissions without rate limiting or account lockout and continues testing each password. No prior account access or user interaction is required, but successful access still depends on guessing a valid password for a configured account.

The record

CVE
CVE-2023-27152
Published
Oct 23, 2023
Updated
Sep 11, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-307, CAPEC-49, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
CAPEC-49Password Brute Forcing
T1110.001Password Guessing

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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