What is CVE-2021-43846?

CVE-2021-43846 is a medium-severity vulnerability in Nebulab Solidus, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.3/10. Published 2021-12-20.

How severe is CVE-2021-43846?

Medium severity. CVSS v3 base score is 5.3 out of 10.

CSRF in Nebulab Solidus

CVE-2021-43846

`solidus_frontend` is the cart and storefront for the Solidus e-commerce project. Versions of `solidus_frontend` prior to 3.1.5, 3.0.5, and 2.11.14 contain a cross-site request forgery (CSRF) vulnerability that allows a malicious site to add an item to the user's cart without their knowledge. Versions 3.1.5, 3.0.5, and 2.11.14 contain a patch for this issue. The patch adds CSRF token verification to the "Add to cart" action. Adding forgery protection to a form that missed it can have some side effects. Other CSRF protection strategies as well as a workaround involving modifcation to config/application.rb` are available. More details on these mitigations are available in the GitHub Security Advisory.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Nebulab Solidus
Solidusio Solidus — versions >= 3.1.0, < 3.1.5, >= 3.0.0, < 3.0.5, < 2.11.14

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/solidusio/solidus/security/advisories/GHSA-h3fg-h5v3-vf8m (Exploit, Third Party Advisory, Mitigation)
github.com/solidusio/solidus/commit/4d17cacf066d9492fc04eb3a0b16084b47376d81 (Patch, Third Party Advisory)
github.com/solidusio/solidus/commit/a1b9bf7f24f9b8684fc4d943eacb02b1926c77c6 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43846?: CVE-2021-43846 is a medium-severity vulnerability in Nebulab Solidus, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.3/10. Published 2021-12-20.
How severe is CVE-2021-43846?: Medium severity. CVSS v3 base score is 5.3 out of 10.