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Abandoned Cart Pro for WooCommerce <= 10.8.0 — Unauthenticated Authentication Bypass via Malleable Encryption and Bypassable HMAC via Recovery Link 'validate' Parameter

CVE-2026-97657Published · Updated

Action summary

Affected: ≤10.8.0Update to 10.8.1 or newer

All remediation steps
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-639 Authorization Bypass Through User-Controlled Key
Required access
No account needed
Exploit prediction (EPSS)
0.4% chance in 30 days39th percentile
CISA KEV
Not listed
On this page8

Am I affected?

Abandoned Cart Pro for WooCommerce woocommerce-abandon-cart-pro

  1. Affected≤ 10.8.0
  2. Patched in10.8.1

Update to 10.8.1 or newer.

You are affected if you run ≤ 10.8.0. Version 10.8.1 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Abandoned Cart Pro for WooCommerce.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 10.8.1, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Abandoned Cart Pro for WooCommerce to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to andrea bocchetti.

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Abandoned Cart Pro for WooCommerce

All 7
More vulnerabilities in Abandoned Cart Pro for WooCommerce
SeverityVulnerabilityCVEPublished
Critical9.8Unauthenticated SQL Injection via Guest Persistent Cart meta_value
≤10.8.0Update to 10.8.1
CVE-2026-97668
High7.5Unauthenticated SQL Injection via AES-CTR Ciphertext Forgery in 'validate' Parameter
≤10.8.0Update to 10.8.1
CVE-2026-102251
High8.8Missing Authorization to Authenticated (Subscriber+) Privilege Escalation
≤10.7.1Update to 10.7.2
CVE-2026-81543
High7.3Unauthenticated Privilege Escalation
≤10.4.0No patch available
CVE-2026-66682
High8.8Authenticated (Subscriber+) Privilege Escalation
≤10.4.0Update to 10.4.1
CVE-2026-56010

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
EPSS
Exploit Prediction Scoring System by FIRST.org.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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