{"cve":"CVE-2021-43805","nvd":{"published":"2021-12-07T18:15:07.407","modified":"2026-06-17T04:11:28.453","status":"Modified","description":"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 The maintainers added a check for email addresses that are no longer valid that will print information about any affected orders that exist.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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-1333"],"references":["https://github.com/solidusio/solidus/commit/9867153e01e3c3b898cdbcedd7b43375ea922401","https://github.com/solidusio/solidus/security/advisories/GHSA-qxmr-qxh6-2cc9","https://github.com/solidusio/solidus/commit/9867153e01e3c3b898cdbcedd7b43375ea922401","https://github.com/solidusio/solidus/security/advisories/GHSA-qxmr-qxh6-2cc9"],"products":["nebulab:solidus"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-43805","score":0.01449,"percentile":0.7335,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-qxmr-qxh6-2cc9","url":"https://osv.dev/vulnerability/GHSA-qxmr-qxh6-2cc9","summary":"ReDos vulnerability on guest checkout email validation","modified":"2026-07-08T06:28:36.700655909Z","packages":[{"ecosystem":"RubyGems","name":"solidus_core","purl":"pkg:gem/solidus_core","ranges":["<2.11.13"],"fixed":["2.11.13"]},{"ecosystem":"RubyGems","name":"solidus_core","purl":"pkg:gem/solidus_core","ranges":[">=3.0.0 <3.0.4"],"fixed":["3.0.4"]},{"ecosystem":"RubyGems","name":"solidus_core","purl":"pkg:gem/solidus_core","ranges":[">=3.1.0 <3.1.4"],"fixed":["3.1.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}