Medium Access control exploit reference

CVE-2026-83743 — invoiceninja Invoice Ninja Vendor Portal Profile Update profile authorization

A weakness has been identified in invoiceninja Invoice Ninja up to 5.13.26. This affects an unknown part of the file /vedor/profile/ of the component Vendor Portal Profile Update. Executing a manipulation of the argument vendor_contact can lead to authorization bypass. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. Upgrading to version 5.13.27 is able to mitigate this issue. This patch is called f86fd9697ce7bd0d28adbe2e6c5890780482ea90. The affected component should be upgraded.

Published Sep 1, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (medium)+3
CISA SSVC: exploitation "poc"+5

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Invoiceninja

Invoice Ninja

CVSS base

6.3

Medium · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Invoiceninja Invoice Ninja).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (access control), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Invoiceninja	Invoice Ninja	version 5.13.13version 5.13.26version 5.13.25version 5.13.24version 5.13.23version 5.13.22version 5.13.21version 5.13.20 and 19 more version 5.13.19version 5.13.18version 5.13.17version 5.13.16version 5.13.15version 5.13.14version 5.13.0version 5.13.12version 5.13.11version 5.13.10version 5.13.9version 5.13.8version 5.13.7version 5.13.6version 5.13.5version 5.13.4version 5.13.3version 5.13.2version 5.13.1	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
5.3	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
2.1	CVSS 4.0	Low	—	—	cna@vuldb.com via NIST National Vulnerability Database
6.3	CVSS 3.1	Medium	2.8	3.4	cna@vuldb.com via NIST National Vulnerability Database
6.3	CVSS 3.1	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
6.3	CVSS 3.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
6.5	CVSS 2.0	Medium	8.0	6.4	cna@vuldb.com via NIST National Vulnerability Database
6.5	CVSS 2.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-285 · Improper Authorization

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Audit administrative actions and access to resources outside each user’s normal pattern.

web/proxy/WAF logsnetwork IDS/IPSauthentication logsapplication logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · invoiceninja/invoice ninja
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 6.3
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 1, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

7 on the record

github.com/invoiceninja/invoiceninja/releases/tag/v5.13.27
patch, NIST National Vulnerability Database
github.com/invoiceninja/invoiceninja/commit/f86fd9697ce7bd0d28adbe2e6c5890780482
patch, NIST National Vulnerability Database
vuldb.com/submit/880053
third-party-advisory, NIST National Vulnerability Database
vuldb.com/cve/CVE-2026-83743
third-party-advisory, NIST National Vulnerability Database
ashutosh-jena.in/blog/broken-access-control-idor-in-invoice-ninja-vendor-portal-v51326
exploit, NIST National Vulnerability Database
vuldb.com/vuln/397499
vdb-entry, technical-description, NIST National Vulnerability Database
vuldb.com/vuln/397499/cti
signature, permissions-required, NIST National Vulnerability Database

Elsewhere on this site

Invoiceninja
every CVE for this vendor

Access control
same class

CWE-285
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-83744 invoiceninja Invoice Ninja invoices Endpoint Purify.php isHostSafe server-side request forgery Sep 1, 2026
High CVE-2026-71233 InvoiceNinja - Stored XSS via Invoice/Quote Terms Field Aug 5, 2026
Medium CVE-2026-58450 Invoice Ninja 5.13.26 - Open Redirect in Client Portal Login via intended Parameter Jun 30, 2026
High CVE-2026-29925 Server-Side Request Forgery (SSRF) in Invoiceninja Invoice Ninja Mar 30, 2026
Medium CVE-2026-33742 Invoice Ninja has Stored XSS via Markdown HTML Injection in Product Notes Mar 26, 2026
Medium CVE-2026-33628 Invoice Ninja Denylist Bypass may Lead to Stored XSS via Invoice Line Items Mar 26, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-83743 is "invoiceninja Invoice Ninja Vendor Portal Profile Update profile authorization", rated Medium. It affects Invoice Ninja (Invoiceninja); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.3 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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