# CVE-2026-15212: WPO365 Login CSRF in update_settings handler

Source: https://junglewise.ai/threats/cve-2026-15212-wpo365-login-csrf-in-update-settings-handler  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-23. Updated: 2026-07-23  
License: CC BY 4.0 with a link back

CVE-2026-15212 · Severity: high · CVSS 8.8 · Published 2026-07-23

The WPO365 | Login plugin for WordPress, which integrates Microsoft services with WordPress sites, contains a security flaw that allows attackers to change the plugin's settings. By tricking a site administrator into clicking a malicious link, an attacker can gain administrative control over the website or modify user roles. This could lead to a full site takeover and unauthorized access to sensitive data.

Technologies: [WPO365 | Login](https://junglewise.ai/threats/technologies/wpo365-login). Vendors: [WPO365](https://junglewise.ai/threats/vendors/wpo365).

## Quick answers

**Is CVE-2026-15212 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15212 being exploited in the wild.

**How severe is CVE-2026-15212?** High severity, with a CVSS score of 8.8, published 23 July 2026.

**Which products and versions are affected?** WPO365 | Login up to, and including, 43.2.

**Is there a fix for CVE-2026-15212?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-15212 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-15212?** Check whether you run WPO365 | Login 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 WPO365 | Login plugin for WordPress is vulnerable to Cross-Site Request Forgery (CSRF) due to a failure in the Ajax_Service::verify_ajax_request() helper. The function gates its wp_verify_nonce() call behind an 'enable_nonce_check' option that is absent from the default configuration, causing it to evaluate to false. Consequently, the wp_ajax_wpo365_update_settings handler accepts cross-origin POST requests. An attacker can provide a base64/JSON 'settings' payload that is merged into the plugin's options without an allowlist. This allows an unauthenticated attacker to enable the SCIM REST endpoint, set a known secret token, and change the default user role to 'administrator' by inducing an authenticated administrator to interact with a malicious link.

## Affected products

- WPO365 WPO365 | Login up to, and including, 43.2

## Timeline

- 2026-07-23: advisory: NVD publication date
- 2026-07-23: disclosed: Wordfence disclosure date

## References

- [https://plugins.trac.wordpress.org/browser/wpo365-login/tags/43.2/Services/Ajax_Service.php](https://plugins.trac.wordpress.org/browser/wpo365-login/tags/43.2/Services/Ajax_Service.php)
- [https://plugins.trac.wordpress.org/changeset/3610759/wpo365-login](https://plugins.trac.wordpress.org/changeset/3610759/wpo365-login)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/51d0ba58-614e-4284-ae0b-b0b76fc5c46d?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/51d0ba58-614e-4284-ae0b-b0b76fc5c46d?source=cve)

## Related threats

- [WPO365 | LOGIN stored cross-site scripting in id_token](https://junglewise.ai/threats/cve-2026-96765-the-wpo365-seamless-wordpress-microsoft-integration-wpo365-login)
- [WPO365 Login authentication bypass via OIDC nonce replay](https://junglewise.ai/threats/cve-2026-104759-the-wpo365-seamless-wordpress-microsoft-integration-wpo365-login)