Quick answers
- Is CVE-2026-81428 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-81428 being exploited in the wild.
- How severe is CVE-2026-81428?
- Medium severity, with a CVSS score of 6.5, published 2 September 2026.
- Which products and versions are affected?
- WC Vendors before 2.7.2.1.
- Is there a fix for CVE-2026-81428?
- A patch was published on 2026: Fixed in version 2.7.2.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-81428 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-81428?
- Check whether you run WC Vendors at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an Insecure Direct Object Reference (IDOR) in the product variation save functionality. The plugin's front-end form handler accepts user-supplied variation IDs in the `variable_post_id[]` array without validating ownership or object type before committing changes to the database. An authenticated vendor can craft a POST request to the product-edit endpoint, referencing another vendor's variation ID or any arbitrary post ID, and modify its price, SKU, and status fields. Because the wp_posts UPDATE statement executes before WooCommerce validates the object type, arbitrary posts are also affected. Exploitation requires vendor role access and a valid nonce (which is not per-product), but an attacker does not need to own any product to launch the attack.
Affected products
- WC Vendors WC Vendors before 2.7.2.1
Timeline
- 2026-08-31: disclosed
- 2026: patched: Fixed in version 2.7.2.1
- 2026-09-02: advisory