CVE-2026-82519: Really Simple Security < 9.8.2 Authorization Bypass via profile-page update handler

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-14 · updated 2026-09-20
Weakness: CWE-862

Description

Really Simple Security plugin for WordPress before 9.8.2 contains a missing authorization check vulnerability that allows authenticated low-privileged attackers to bypass enforced two-factor authentication indefinitely by exploiting an unguarded code path in the profile-page update handler. Attackers can submit a crafted POST request without the two-factor-authentication field to skip nonce verification and trigger delete_two_fa_meta(), which resets the grace period anchor timestamp on every login cycle, causing mandatory 2FA enforcement to be deferred indefinitely.

Affected products

reallysimpleplugins Really Simple Security: before 9.8.2 — fixed in 9.8.2

How to fix

Upgrade to a fixed version: reallysimpleplugins Really Simple Security 9.8.2. Check the vendor advisory for mitigations.

References

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