Abandoned Cart Pro for WooCommerce <= 10.8.0 - Unauthenticated Authentication Bypass via Malleable Encryption and Bypassable HMAC via Recovery Link 'validate' Parameter
Summary
| CVE | CVE-2026-97657 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-14 03:17:37 UTC |
| Updated | 2026-10-14 19:17:23 UTC |
| Description | The Abandoned Cart Pro for WooCommerce plugin for WordPress is vulnerable to Authentication Bypass via Malleable Encryption and Bypassable HMAC in all versions up to, and including, 10.8.0. This is due to the use of MAC-free AES-CTR encryption for cart-recovery link tokens — where the 8-byte CTR nonce is carried inside the ciphertext blob and the encryption key is looked up using the attacker-supplied `user_email` GET parameter — combined with an HMAC nonce check in `wcap_email_track_links()` that is only enforced when the `wcap_nonce` parameter is non-empty, allowing complete bypass by omission, and an insecure direct object reference on the decrypted `abandoned_id` with no ownership verification confirming the cart belongs to the email used for decryption. This makes it possible for unauthenticated attackers who possess a single legitimate cart-recovery link (obtained from their own reminder email) to recover the keystream, forge a ciphertext that decrypts to any victim's cart ID, and trigger a call to `wp_set_auth_cookie()` for the victim user — achieving full account takeover of any user who has ever abandoned a cart, including administrators. The auto-login feature defaults to enabled and is forced on during plugin upgrades, meaning all affected installations are exploitable without any additional configuration. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.003760000 probability, percentile 0.298490000 (date 2026-10-14)
Problem Types: CWE-639 | CWE-639 CWE-639 Authorization Bypass Through User-Controlled Key
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Tyche Softwares | Abandoned Cart Pro For WooCommerce | affected 10.8.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.tychesoftwares.com/docs/docs/abandoned-cart-pro-for-woocommerce-new/changelog-ab... | [email protected] | www.tychesoftwares.com | |
| www.wordfence.com/threat-intel/vulnerabilities/id/b25b4aed-94b2-4c16-8e4e-39aec... | [email protected] | www.wordfence.com | |
| www.tychesoftwares.com/products/woocommerce-abandoned-cart-pro-plugin | [email protected] | www.tychesoftwares.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: andrea bocchetti (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-13T13:52:13.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.