CVE-2026-103331 UniPAY Payment Gateway For WooCommerce <= 2.3 - Unauthenticated Order Payment Forgery via Empty IPN Secret
Medium 5.3
Published
Updated
Check this codebase for CVE-2026-103331 and fix it if it is affected.
What it is: CVE-2026-103331 is a medium-severity vulnerability in Unknown UniPAY Payment Gateway For WooCommerce, published on 28 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-103331 in the wild and no public exploit code.
Affected product: Unknown UniPAY Payment Gateway For WooCommerce. 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-2026-103331/ (Markdown: https://insights.sbomify.com/CVE-2026-103331/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-103331?
CVE-2026-103331 is a medium-severity vulnerability in Unknown UniPAY Payment Gateway For WooCommerce, published on 28 Oct 2026.
Official description
The UniPAY Payment Gateway For WooCommerce WordPress plugin through 2.3 does not properly verify the authenticity of payment notifications, as their signature is checked against a merchant secret that is empty by default, allowing unauthenticated attackers to forge a valid notification and mark arbitrary orders as paid.
Weakness: CWE-287
Which versions are affected by CVE-2026-103331?
How do I fix CVE-2026-103331?
No fix has been published for CVE-2026-103331 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103331 being exploited?
There is no known exploitation of CVE-2026-103331 in the wild and no public exploit code.
Sources
Also known as GHSA-c6r8-q9rq-vw5v.