CVE-2026-9021Network attack vector

Unauthenticated quote manipulation via exposed nonces

Published Jul 9, 2026 · Updated Jul 9, 2026

Missing authorization in Easy Invoice 2.2.19 and earlier allows remote attackers to accept or decline any published quote. Public quote templates expose quote-scoped nonces, while unauthenticated AJAX handlers treat each nonce as sufficient authorization and enforce ownership only when an off-by-default Pro restriction is enabled. Any remote attacker who can load a published quote page can alter its status and, under configured acceptance actions, trigger invoice creation and client email.

CVSS severity5.3
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Easy Invoice 2.2.19 and earlier allows remote attackers to accept or decline any published quote. Public quote templates expose quote-scoped nonces, while unauthenticated AJAX handlers treat each nonce as sufficient authorization and enforce ownership only when an off-by-default Pro restriction is enabled. Any remote attacker who can load a published quote page can alter its status and, under configured acceptance actions, trigger invoice creation and client email.

The record

CVE
CVE-2026-9021
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
MatrixAddons
Product
Easy Invoice
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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=0 <=2.2.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MatrixAddons · Easy Invoiceversion=0 <=2.2.19

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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