Skip to content
EXYS
Back to the CVEs

CVE-2026-122220

7.4, high

WPO365 | LOGIN (wpo365-login) plugin before version 45.2 contains an authentication bypass by capture-replay vulnerability caused by a…

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.4, high high CVSS v3.1
EPSS, next 30 days
n/a
Exploitation
No public evidence
Published
4 Nov 2026yesterday

Description

WPO365 | LOGIN (wpo365-login) plugin before version 45.2 contains an authentication bypass by capture-replay vulnerability caused by a non-functional anti-replay check in Saml2_Service::check_message_id(), which never persists processed SAML message IDs to the wpo365_saml_message_ids transient due to a logic error that returns before saving. Attackers who capture a validly-signed SAMLResponse can replay it to the ACS endpoint repeatedly within its assertion validity window to log in as the victim, including administrators, without detection since the duplicate message ID check never triggers.

Details

Vendor
Wpo365
Product
WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN)
Weakness
CWE-294 (opens in a new tab)
Status
Received
Updated
4 Nov 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References 3

Other references 3

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Wpo365 CVEs

Every Wpo365 CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-107759 WPO365 | MICROSOFT 365 GRAPH MAILER Cross-Site Scripting Vulnerability EPSS 0.3% 7.2, high

Beyond this page

Is CVE-2026-122220 in your network?

This page tells you how dangerous CVE-2026-122220 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-122220 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 5 Nov 2026, not the live upstream state.