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CVE-2026-19714 – Authentication Bypass / Admin Impersonation – Simple JWT Login WordPress Plugin < 3

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Summary

CVE-2026-19714 is a critical improper authentication vulnerability (CWE-287) in the Simple JWT Login WordPress plugin. Versions before 3.6.8 fail to validate the audience claim of Google identity tokens, allowing an unauthenticated attacker to authenticate as any user — including an administrator — by presenting a token containing that user’s email address. The flaw carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: the plugin’s Google sign-in login flow accepts Google identity (id_token) tokens without validating the aud (audience) claim, so a token not actually issued for the target site can still be accepted.
  • Trigger condition: the site must have the plugin’s Google sign-in feature enabled.
  • Attack vector: network-based, no authentication or user interaction required; the attacker submits a Google identity token bearing the victim’s email address to the plugin’s login endpoint.
  • Impact: full account takeover, including of administrator accounts, since the plugin trusts the email claim in the token without confirming it was minted for this site.

Affected software

  • Simple JWT Login WordPress plugin: all versions before 3.6.8 (with Google sign-in enabled)

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: upgrade Simple JWT Login to version 3.6.8 or later.
  • If patching is not immediately possible: disable the plugin’s Google sign-in feature until the upgrade can be applied.

How IONIX identifies potentially affected assets

IONIX matches the following signal against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body (HTML): /wp-content/plugins/simple-jwt-login/

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
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