EUVD-2026-40419
GHSA-wcjx-7qfj-3c4v
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable with no authentication needed to plant the redirect (PR:N, AV:N), but requires victim to click and log in (UI:R); impact is phishing-only, so C:L with no integrity or availability effect.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
Invoice Ninja through 5.13.26 contains an open redirect vulnerability in the client portal login that allows unauthenticated attackers to redirect authenticated victims to attacker-controlled external URLs by injecting a malicious value into the intended query parameter. Attackers can craft a client login link with an external URL in the intended parameter, which is stored in the session without host validation and emitted verbatim via a bare redirect in the ContactLoginController authenticated() handler after the victim completes a legitimate login, enabling phishing attacks.
AnalysisAI
Open redirect in Invoice Ninja's client portal login (through version 5.13.26) enables unauthenticated attackers to craft login URLs that transparently redirect authenticated victims to attacker-controlled external sites after they complete a legitimate login. The vulnerability stems from the intended query parameter being stored in the session without host validation, then emitted verbatim by the ContactLoginController::authenticated() handler post-login, making it a reliable phishing vector against Invoice Ninja clients. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must click a specially crafted Invoice Ninja client portal login URL containing an attacker-supplied external URL in the `intended` query parameter, and then successfully complete a legitimate login with a valid client account. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.3 (Medium) score with vector AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N is an accurate characterization of the flaw's mechanics: network-accessible with low complexity and no authentication required to plant the malicious URL, but dependent on victim interaction (UI:R) and capped at limited confidentiality impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a client portal login URL such as `https://target.invoiceninja.com/client/login?intended=https://attacker.com/harvest` and distributes it via a phishing email mimicking a legitimate invoice notification. The victim, recognizing the authentic Invoice Ninja domain, completes the login flow normally, after which the server issues a redirect to the attacker-controlled site where credentials or payment details can be harvested. … |
| Remediation | The primary remediation is to upgrade Invoice Ninja beyond version 5.13.26 once a patched release is available; however, no specific fixed version has been independently confirmed from the available references - monitor the GitHub issue at https://github.com/invoiceninja/invoiceninja/issues/12039 for patch release status. … Detailed patch versions, workarounds, and compensating controls in full report. |
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