Auth bypass in Welcart E-Commerce

CVE-2025-15671

The Welcart e-Commerce WordPress plugin before 2.12.1 does not regenerate the session identifier on authentication and sets the session identifier from a user-supplied request parameter, allowing an unauthenticated attacker to fixate a shop member's session and take over their customer account after the victim logs in through an attacker-crafted request.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-15671: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

  • Welcart E-Commerce

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-15671?
CVE-2025-15671 is a medium-severity vulnerability in Welcart E-Commerce, classified under Improper Authentication. CVSS score: 5.4/10. Published 2026-08-21.
How severe is CVE-2025-15671?
Medium severity. CVSS v3 base score is 5.4 out of 10.