CVE-2021-43805: Nebulab Solidus

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Solidus is a free, open-source ecommerce platform built on Rails. Versions of Solidus prior to 3.1.4, 3.0.4, and 2.11.13 have a denial of service vulnerability that could be exploited during a guest checkout. The regular expression used to validate a guest order's email was subject to exponential backtracking through a fragment like `a.a.` Versions 3.1.4, 3.0.4, and 2.11.13 have been patched to use a different regular expression. The maintainers added a check for email addresses that are no longer valid that will print information about any affected orders that exist. If a prompt upgrade is not an option, a workaround is available. It is possible to edit the file `config/application.rb` manually (with code provided by the maintainers in the GitHub Security Advisory) to check email validity.

Affected products

• Nebulab Solidus: before 2.11.13 (fixed in 2.11.13); from 3.0.0, before 3.0.4 (fixed in 3.0.4); from 3.1.0, before 3.1.4 (fixed in 3.1.4)

Published 2021-12-07. Last modified 2026-06-17.