CVE-2026-71233Network attack vector

Stored XSS via unsanitized terms rendering

Published Aug 5, 2026 · Updated Aug 5, 2026

Stored XSS in Invoice Ninja 5.0.0 allows remote authenticated users to execute JavaScript in client browsers through crafted invoice terms. The client-portal terms Blade template emits entity terms with raw output, while StoreInvoiceRequest removes only newlines and leaves HTML unsanitized. Exploitation requires invoice-creation permission and a client to view the invoice or quote; the script runs in that client's browser, exposing session cookies and permitting portal account takeover.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Invoice Ninja 5.0.0 allows remote authenticated users to execute JavaScript in client browsers through crafted invoice terms. The client-portal terms Blade template emits entity terms with raw output, while StoreInvoiceRequest removes only newlines and leaves HTML unsanitized. Exploitation requires invoice-creation permission and a client to view the invoice or quote; the script runs in that client's browser, exposing session cookies and permitting portal account takeover.

The record

CVE
CVE-2026-71233
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Invoice Ninja
Product
Invoice Ninja
Classifications
T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Invoice Ninja · Invoice Ninjaversion=5.0.0

Published CVSS scores

No CVSS assessment is available in this record.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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