Read the docs
TI-2026-70212 Aliases CVE-2026-96765GHSA-87pp-p526-6wm7

Stored cross-site scripting in WPO365 Login WordPress plugin

Priority LOW 32CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The WPO365 | Login plugin for WordPress is vulnerable in all versions up to and including 44.1. Insufficient input sanitization and output escaping (CWE-79) let an unauthenticated attacker send a forged id_token whose unique_name or iss claim contains HTML, which is stored for up to three days and runs when a user accesses an injected page, such as an administrator visiting the WPO365 wizard page.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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 payload is stored in the wpo365_errors transient for up to three days by submitting a crafted unauthenticated request with a forged id_token whose base64url-decoded unique_name or iss claim contains malicious HTML, requiring no prior authentication or user interaction beyond an administrator later visiting the WPO365 wizard page.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00321 25th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
wpo365WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN)up to 44.1—No fix listedCNA
  • WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) Vendorwpo365 Affected up to 44.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for WPO365 | WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-10 Threatist record created from CVE-2026-96765
  2. 2026-10-10 Alias added: GHSA-87pp-p526-6wm7
  3. 2026-10-11 CISA SSVC decision points changed
  4. 2026-10-11 Priority changed: MEDIUM → LOW

References

Other 9

  • TI-2021-19351 WPO365 | LOGIN - Wordpress Plugin Persistent Cross-Site Scripting CVSS 3.1CRITICAL 9.3
  • TI-2026-85151 Authentication bypass via SAML replay in WPO365 LOGIN plugin CVSS 4.0CRITICAL 9.1
  • TI-2026-12809 Cross-site request forgery in WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION CVSS 3.1HIGH 8.8
  • TI-2026-70259 Authentication bypass in WPO365 WordPress plugin via OIDC nonce replay CVSS 3.1HIGH 8.1
  • TI-2020-16157 The wpo365-login plugin before v11.7 for WordPress allows use of a symmetric algorithm to… CVSS 3.1HIGH 7.5
  • TI-2026-83509 Stored cross-site scripting in WPO365 Microsoft 365 Graph Mailer CVSS 3.1HIGH 7.2
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences