# CVE-2026-91020: WebToffee Gift Cards for WooCommerce < 1.3.1 - Unauthenticated Gift Card Amount Manipulation via wt_credit_amount

> Unauthenticated attackers can manipulate gift card amounts to bypass payment validation and obtain products for free in WebToffee Gift Cards for WooCommerce.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Oct 2026
- **Updated:** 2 Oct 2026
- **Also known as:** GHSA-5v9w-gc32-w7g2

## What is CVE-2026-91020?

CVE-2026-91020 is a medium-severity vulnerability in Unknown WebToffee Gift Cards for WooCommerce, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The WebToffee Gift Cards for WooCommerce WordPress plugin before 1.3.1 does not validate a user-supplied gift card amount server-side before using it as the cart-item price and store-credit coupon value, allowing unauthenticated users to submit an arbitrary or negative amount, bypassing the configured denominations and manipulating the order total to obtain products without paying.

Weakness: CWE-472 (External Control of Assumed-Immutable Web Parameter)

## Which versions are affected by CVE-2026-91020?


## How do I fix CVE-2026-91020?

No fix has been published for CVE-2026-91020 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-91020 being exploited?

There is no known exploitation of CVE-2026-91020 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-91020 and fix it if it is affected.

What it is: CVE-2026-91020 is a medium-severity vulnerability in Unknown WebToffee Gift Cards for WooCommerce, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-91020 in the wild and no public exploit code.

Affected product: Unknown WebToffee Gift Cards 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-2026-91020/ (Markdown: https://insights.sbomify.com/CVE-2026-91020/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-91020
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-91020
- OSV: https://osv.dev/vulnerability/CVE-2026-91020

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-91020/
Summaries are generated and may contain mistakes; the official description above is the record.