CVE-2023-35876Network attack vector

Authenticated order modification via unchecked AJAX authorization

Published Dec 20, 2023 · Updated Apr 28, 2026

Authorization bypass in WooCommerce Square 3.8.1 and earlier allows remote authenticated users to modify other users' orders. Multiple AJAX handlers accept user-controlled order identifiers and perform order operations without verifying the caller's capability for the referenced order. Contributor-level access is sufficient, and the bounded consequence is unauthorized modification of another user's order data.

CVSS severity8.1
High
EPSS probability0.83%
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 WooCommerce Square 3.8.1 and earlier allows remote authenticated users to modify other users' orders. Multiple AJAX handlers accept user-controlled order identifiers and perform order operations without verifying the caller's capability for the referenced order. Contributor-level access is sufficient, and the bounded consequence is unauthorized modification of another user's order data.

The record

CVE
CVE-2023-35876
Published
Dec 20, 2023
Updated
Apr 28, 2026
Vendor
WooCommerce
Product
WooCommerce Square
Classifications
CWE-639, T1565
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 20, 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

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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=n/a <=3.8.1 changes=[{"at":"3.8.2","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WooCommerce · WooCommerce Squareversion=n/a <=3.8.1 changes=[{"at":"3.8.2","status":"unaffected"}]

Published CVSS scores

8.1PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565Data 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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