CVE-2023-51503Network attack vector

Unauthenticated data disclosure via user-controlled object key

Published Dec 31, 2023 · Updated Apr 28, 2026

Authorization bypass in Automattic WooPayments 6.6.2 and earlier allows remote attackers to read sensitive data via object identifiers. The public advisory does not identify the endpoint, object type, parameter, or authorization check that mishandles a user-controlled key. No authentication is required; the published impact is limited to confidentiality, and the exposed data has not been identified.

CVSS severity5.9
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Automattic WooPayments 6.6.2 and earlier allows remote attackers to read sensitive data via object identifiers. The public advisory does not identify the endpoint, object type, parameter, or authorization check that mishandles a user-controlled key. No authentication is required; the published impact is limited to confidentiality, and the exposed data has not been identified.

The record

CVE
CVE-2023-51503
Published
Dec 31, 2023
Updated
Apr 28, 2026
Vendor
Automattic
Product
WooPayments
Classifications
CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=n/a <=6.9.2 changes=[{"at":"6.7.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Automattic · WooPaymentsversion=n/a <=6.9.2 changes=[{"at":"6.7.0","status":"unaffected"}]

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9PatchstackCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

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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