CVE-2026-71531

PrestaShop Webservice API Authorization Bypass via id_shop Parameter

Published Nov 13, 2026 CVSS 4.0 · 8.6 High EPSS n/a KEV · Not listed

Description

PrestaShop before 8.2.9 and 9.2.1 contains an authorization flaw in the Webservice API that allows an attacker holding a key restricted to one shop to act on data of every shop by submitting requests with id_shop=all or id_shop_group=N, which expand the shop context without validating the key's actual shop associations and cause shopHasRight() to evaluate the expanded set as a disjunction. Attackers can exploit this flaw via classes/webservice/WebserviceRequest.php to read, modify, or delete data belonging to shops they are not authorized for, including full customer records such as email addresses, secure_key, and password hashes across the installation.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

PrestaShop

unaffected

Version	Status	Constraints
`0`	affected	< 8.2.9
`9.0.0`	affected	< 9.2.1

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/PrestaShop/PrestaShop/releases/tag/8.2.9
https://github.com/PrestaShop/PrestaShop/releases/tag/9.2.1
https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-3f36-4qv4-vfgh
https://www.vulncheck.com/advisories/prestashop-webservice-api-authorization-bypass-via-id-shop-parameter

History

Nov 13, 2026 10:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		PrestaShop before 8.2.9 and 9.2.1 contains an authorization flaw in the Webservice API that allows an attacker holding a key restricted to one shop to act on data of every shop by submitting requests with id_shop=all or id_shop_group=N, which expand the shop context without validating the key's actual shop associations and cause shopHasRight() to evaluate the expanded set as a disjunction. Attackers can exploit this flaw via classes/webservice/WebserviceRequest.php to read, modify, or delete data belonging to shops they are not authorized for, including full customer records such as email addresses, secure_key, and password hashes across the installation.
Title		PrestaShop Webservice API Authorization Bypass via id_shop Parameter
Weaknesses		CWE-863
References		https://github.com/PrestaShop/PrestaShop/releases/tag/8.2.9 https://github.com/PrestaShop/PrestaShop/releases/tag/9.2.1 https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-3f36-4qv4-vfgh https://www.vulncheck.com/advisories/prestashop-webservice-api-authorization-bypass-via-id-shop-parameter
Metrics		cvssV3_1 `{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}` cvssV4_0 `{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}`