CVE-2026-104641 Simple Shopping Cart < 5.3.3 - Unauthenticated Payment Bypass via Unverified PayPal IPN Recipient
Medium 5.3
Published
Updated
Check this codebase for CVE-2026-104641 and fix it if it is affected.
What it is: CVE-2026-104641 is a medium-severity vulnerability in Unknown Simple Shopping Cart, published on 21 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-104641 in the wild and no public exploit code.
Affected product: Unknown Simple Shopping Cart. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-104641/ (Markdown: https://insights.sbomify.com/CVE-2026-104641/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-104641?
CVE-2026-104641 is a medium-severity vulnerability in Unknown Simple Shopping Cart, published on 21 Oct 2026.
Official description
The Simple Shopping Cart WordPress plugin before 5.3.3 does not verify that a PayPal payment notification is for a payment received by the site owner's PayPal account in its default configuration, allowing unauthenticated attackers to have their orders marked as paid using a payment made to an account they control.
Weakness: CWE-345
Which versions are affected by CVE-2026-104641?
How do I fix CVE-2026-104641?
No fix has been published for CVE-2026-104641 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104641 being exploited?
There is no known exploitation of CVE-2026-104641 in the wild and no public exploit code.
Sources
Also known as GHSA-g546-6f38-794c.