VulnerabilityPublished 18 Sep 2024Updated 20 Sep 2024

CVE-2024-45523: Bravura Security Fabric · Improper Restriction of Excessive Authentication Attempts

Source CVE Database V5

Not known to be exploited · CVSS 9.1 Critical · fixed in 12.7.1.38241 : patch affected systems as a priority.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

9.1Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 12.7.1.38241, 12.6.2.37183, 12.5.2.35950 +2

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Sep 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Organizations should immediately identify all instances of Bravura Security Fabric in their environment and verify the version in use. Applying the vendor-provided patches for versions 12.3.5.32784, 12.4.3.35110, 12.5.2.35950, 12.6.2.37183, and 12.7.1.38241 or later is the most effective mitigation. Until patches can be applied, administrators should implement network-level protections such as rate limiting or blocking excessive failed login attempts to the SOAP API endpoint. Deploying Web Application Firewalls (WAFs) with rules to detect and block repeated failed authentication attempts can reduce attack surface. Monitoring authentication logs for unusual patterns of failed logins can provide early detection of exploitation attempts. Additionally, restricting access to the SOAP API to trusted IP addresses or VPNs can reduce exposure. Security teams should update incident response plans to include this vulnerability and prepare for potential DoS scenarios. Regularly reviewing and hardening authentication mechanisms and API security controls will help prevent similar issues in the future.

Description

An issue was discovered in Bravura Security Fabric versions 12.3.x before 12.3.5.32784, 12.4.x before 12.4.3.35110, 12.5.x before 12.5.2.35950, 12.6.x before 12.6.2.37183, and 12.7.x before 12.7.1.38241. An unauthenticated attacker can cause a resource leak by issuing multiple failed login attempts through API SOAP.

Impact

The primary impact of CVE-2024-45523 is the potential for denial of service through resource exhaustion caused by repeated failed login attempts. This can disrupt normal operations of Bravura Security Fabric deployments, leading to service unavailability and potential interruption of security monitoring and enforcement functions. The vulnerability also impacts confidentiality because the CVSS vector indicates a high confidentiality impact, which may be due to system instability or unintended information disclosure during the resource exhaustion state. Organizations relying on Bravura Security Fabric for critical security infrastructure could face operational downtime, increased risk exposure, and potential cascading failures in their security posture. The unauthenticated nature of the attack vector increases the risk of exploitation by external threat actors, including opportunistic attackers and advanced persistent threats. The absence of known exploits in the wild currently limits immediate risk, but the critical severity and ease of exploitation mean that exploitation attempts could emerge rapidly once the vulnerability becomes widely known.

CWE-307Improper Restriction of Excessive Authentication Attempts (opens in a new tab)
Base weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
Architecture and Design
Common protection mechanisms include: Disconnecting the user after a small number of failed attempts; Implementing a timeout; Locking out a targeted account; Requiring a computational task on the user's part.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authentication (opens in a new tab)
Transport Layer Protection (opens in a new tab)
TLS Cipher String (opens in a new tab)
OWASP ASVS 4.0.3
V2.2.1 (opens in a new tab)
V2.8.5 (opens in a new tab)
V2.8.4 (opens in a new tab)
Attack patterns
Dictionary-based Password Attack (opens in a new tab)
Password Brute Forcing (opens in a new tab)
Password Spraying (opens in a new tab)
Credential Stuffing (opens in a new tab)
Use of Known Kerberos Credentials (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

bravurasecurity.com/cve-2024-45523-resource-leak-in-api-after-a-failed-login-attempt (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 26 Feb 2026, 08:17 UTC

WeaknessesCWE-307

Technical details

References

Community reviews

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