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FluentAuth CVE-2026-78296

| EUVDEUVD-2026-81431 MEDIUM
Insufficient Verification of Data Authenticity (CWE-345)
2026-09-17 Patchstack GHSA-m62p-pchr-c9vv
5.3
CVSS 3.1 · Vendor: Patchstack
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Severity by source

Vendor (Patchstack) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
vuln.today AI
7.5 HIGH

Remote unauthenticated data-authenticity flaw; the reference's account-takeover framing implies full integrity compromise (I:H) rather than the vendor's understated I:L, with no confidentiality/availability impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

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

Lifecycle Timeline

3
Metadata Corrected
Sep 17, 2026 - 12:40 vuln.today
tag: Information Disclosure removed
Analysis Generated
Sep 17, 2026 - 12:01 vuln.today
CVE Published
Sep 17, 2026 - 11:05 cve.org
MEDIUM 5.3

DescriptionCVE.org

Insufficient Verification of Data Authenticity vulnerability in WP ManageNinja LLC FluentAuth allows Identity Spoofing.

This issue affects FluentAuth: from n/a through 2.1.2.

AnalysisAI

Unauthenticated remote attackers can spoof identities and potentially take over accounts on WordPress sites running the FluentAuth (fluent-security) plugin through version 2.1.2 due to insufficient verification of data authenticity (CWE-345). The vendor CVSS 3.1 base score is 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N), which reflects a remotely reachable, low-complexity integrity flaw with limited impact, but our assessment raises the integrity impact to High (I:H) given the authentication bypass to account takeover described in the advisory. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Requires a WordPress site running the WP ManageNinja FluentAuth (fluent-security) plugin at version 2.1.2 or earlier. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Vendor CVSS 3.1 base of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N) frames this as a remotely reachable, unauthenticated, low-complexity integrity flaw with only limited integrity impact and no confidentiality or availability effect. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-78296 vulnerability details – vuln.today

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