Auth bypass in Guchengwuyue Yshop-Crm
CVE-2026-92455
yshop-crm through 2.1.3 fails to enforce authorization on the sendSms and sendMail endpoints in CrmCustomerController, allowing any authenticated back-office user to send SMS and email to arbitrary customers. Attackers can invoke POST /admin-api/crm/customer/send-sms and POST /admin-api/crm/customer/send-mail with arbitrary customerIds, templateCode, and templateParams to deliver unauthorized messages through the organization's SMS and email channels.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/LinYuanyi1/cve-request-poc/blob/master/yshop-crm/C01_crm_customer_se… (exploit)
- github.com/LinYuanyi1/cve-request-poc/blob/master/yshop-crm/C02_crm_customer_se… (exploit)
- github.com/guchengwuyue/yshop-crm/blob/5f5810a0e1e4ab0828523ec299bf973c2f9065d7… (technical-description)
- github.com/guchengwuyue/yshop-crm/blob/5f5810a0e1e4ab0828523ec299bf973c2f9065d7… (technical-description)
- github.com/guchengwuyue/yshop-crm/blob/5f5810a0e1e4ab0828523ec299bf973c2f9065d7… (technical-description)
- github.com/guchengwuyue/yshop-crm (product)
- www.vulncheck.com/advisories/yshop-crm-through-2.1.3-missing-authorization-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92455?
- CVE-2026-92455 is a medium-severity vulnerability in Guchengwuyue Yshop-Crm, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-16.
- How severe is CVE-2026-92455?
- Medium severity. CVSS v3 base score is 4.3 out of 10.