CVE-2026-96765: Unauthenticated Stored Cross-Site Scripting in WPO365

Who should care

WordPress administrators and users of the WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) plugin should be aware of this vulnerability and take necessary actions to protect their installations.

Why it matters

The WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id_token' parameter in all versions up to, and including, 44.1 due to insufficient input sanitization and output escaping.

Unauthenticated attackers can inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
This vulnerability can lead to potential security breaches and compromise of sensitive data.
Defenders should prioritize verifying the presence of this vulnerability in their WordPress installations and updating to a patched version if available.
Verification of the vulnerability and remediation are required.

Technical summary

The WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id_token' parameter in all versions up to, and including, 44.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability has a CVSS score of 7.2 and is considered HIGH severity. Defenders should prioritize verifying the presence of this vulnerability in their WordPress installations and updating to a patched version if available.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their WordPress installations and updating to a patched version if available.

Recommended defensive actions

Verify the presence of this vulnerability in your WordPress installations
Update to a patched version if available
Monitor for potential exploitation attempts
Review compensating controls for exposed systems while remediation is scheduled and verified
Check relevant monitoring, detection, and logs for exposed assets that need extra review
Track exceptions, retest remediated assets, and close the item only after evidence is documented
Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, affected versions, and CVSS score of 7.2. The WPO365 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id_token' parameter. This vulnerability allows unauthenticated attackers to inject arbitrary web scripts. The payload is stored in the wpo365_errors transient for up to three days. Defenders should verify the presence of this vulnerability in their WordPress installations and update to a patched version if The CVE

Sources and references

Verified primary and authoritative sources

CVE-2026-96765 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-96765

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-96765 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-96765

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) <= 44.1 - Unauthenticated S
Unverified legacy reference

URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/96xxx/CVE-2026-96765.json

cve_program_cvelist_v5
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/apps/dist/wizard-chunk-BpsKdXb9.js

Supplemental source
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Id_Token_Service.php

Supplemental source
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Log_Service.php

Supplemental source
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Core/Script_Helpers.php

Supplemental source
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Router_Service.php

Supplemental source
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Request_Service.php

Supplemental source
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/changeset/3727410/wpo365-login

Supplemental source

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.