CVE-2026-57418

Sprout Invoices – Client Invoicing & Estimates <= 20.8.13 - Missing Authorization

2026-07-08 00:00

Strategic Overview

Status: Patched in 20.8.14
Affected Plugin: Sprout Invoices – Client Invoicing & Estimates
Affected Version: <= 20.8.13
CVSS: 4.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2026-57418

View all Sprout Invoices – Client Invoicing & Estimates vulnerabilities

At a glance

CVE-2026-57418 is a medium-severity Missing Authorization vulnerability in the Sprout Invoices WordPress plugin, affecting versions <= 20.8.13. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 20.8.14; sites on affected versions should update now. Disclosed July 2026, reported by she11f.

Vulnerability Overview

The Sprout Invoices – Client Invoicing & Estimates plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in versions up to, and including, 20.8.13. This makes it possible for authenticated attackers, with subscriber-level access and above, to perform an unauthorized action.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Sprout Invoices <= 20.8.13 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Sprout Invoices the fix is 20.8.14: builds <= 20.8.13 are affected, anything from 20.8.14 onward is not.

Remediation

Update to version 20.8.14, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Sprout Invoices 20.8.14 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-57418 https://www.wordfence.com/threat-intel/vulnerabilities/id/f0292877-33ca-425f-a95b-547b3bed2c10 https://nvd.nist.gov/vuln/detail/CVE-2026-57418

Related records

Same weakness class

Other vulnerabilities in Sprout Invoices – Client Invoicing & Estimates

CVSS Vector

4.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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