# CVE-2026-121574: WP Chill Passster broken access control in content-protector

Source: https://junglewise.ai/threats/cve-2026-121574-missing-authorization-vulnerability-in-wp-chill-passster-content  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-11. Updated: 2026-11-11  
License: CC BY 4.0 with a link back

CVE-2026-121574 · Severity: medium · CVSS 5.3 · Published 2026-11-11

Passster is a WordPress plugin that protects content behind passwords or paywalls. A broken access control flaw allows unauthenticated users to bypass protection and access or perform actions they should not be permitted to do, such as viewing protected pages or data. The vulnerability affects all versions up to 4.3.20 and is fixed in version 4.3.21.

Technologies: [WP Chill Passster](https://junglewise.ai/threats/technologies/wp-chill-passster). Vendors: [WP Chill](https://junglewise.ai/threats/vendors/wp-chill).

## Quick answers

**Is CVE-2026-121574 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121574 being exploited in the wild.

**How severe is CVE-2026-121574?** Medium severity, with a CVSS score of 5.3, published 11 November 2026.

**Which products and versions are affected?** WP Chill Passster through 4.3.20.

**Is there a fix for CVE-2026-121574?** Yes: fixed in 4.3.21. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-121574 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-121574?** Check whether you run WP Chill Passster 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.

## How to fix

- Fixed in 4.3.21

## Technical details

A missing or incorrectly configured access control vulnerability in the Passster WordPress plugin allows unauthenticated attackers to bypass content protection mechanisms via an unspecified attack vector. The vulnerability stems from broken access control (OWASP A1), enabling attackers to view protected content or perform unauthorized actions without proper authorization checks. A fix is available in version 4.3.21.

## Affected products

- WP Chill Passster through 4.3.20

## Timeline

- 2026-11-11: disclosed

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/content-protector/vulnerability/wordpress-passster-plugin-4-3-20-broken-access-control-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/content-protector/vulnerability/wordpress-passster-plugin-4-3-20-broken-access-control-vulnerability?_s_id=cve)

## Related threats

- [WP Chill Passster content-protector stored cross-site scripting](https://junglewise.ai/threats/cve-2026-125454-improper-neutralization-of-input-during-web-page-generation)
- [WP Chill Passster broken access control](https://junglewise.ai/threats/cve-2026-110896-missing-authorization-vulnerability-in-wp-chill-passster-content)