What’s Vulnerable › Vulnerabilities

CVE-2025-59413: CubeCart Unauthorized Newsletter Unsubscription via force_unsubscribe Parameter

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-22 · updated 2026-06-17
• Weakness: CWE-862

Description

CubeCart is an ecommerce software solution. Prior to version 6.5.11, a logic flaw exists in the newsletter subscription endpoint that allows an attacker to unsubscribe any user without their consent. By changing the value of the force_unsubscribe parameter in the POST request to 1, an attacker can force the removal of any valid subscriber’s email address. This issue has been patched in version 6.5.11.

Affected products

• CubeCart Limited CubeCart: before 6.5.11 — fixed in 6.5.11

How to fix

Upgrade to a fixed version: CubeCart Limited CubeCart 6.5.11. Check the vendor advisory for mitigations.

References

• https://github.com/cubecart/v6/commit/7fd1cd04f5d5c3ce1d7980327464f0ff6551de79
• https://github.com/cubecart/v6/commit/db965fcfa260c4f17eb16f8c5494e5af4a8ac271
• https://github.com/cubecart/v6/commit/dbc58cf1f7a6291f7add5893b56bff7920a29128
• https://github.com/cubecart/v6/security/advisories/GHSA-869v-gjv8-9m7f
• https://github.com/cubecart/v6/security/advisories/GHSA-869v-gjv8-9m7f

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