CVE-2026-18056Network attack vector

Account takeover via unvalidated Facebook access tokens

Published Sep 6, 2026 · Updated Sep 7, 2026

Authentication bypass in HivePress Authentication 1.1.4 and earlier allows remote attackers to impersonate existing WordPress users. The Facebook authenticator forwards an attacker-supplied access token to the Graph API and trusts the returned identity without validating the token audience or application ID. Exploitation requires the victim's valid Facebook access token and grants the victim's WordPress privileges, including administrator access when applicable.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in HivePress Authentication 1.1.4 and earlier allows remote attackers to impersonate existing WordPress users. The Facebook authenticator forwards an attacker-supplied access token to the Graph API and trusts the returned identity without validating the token audience or application ID. Exploitation requires the victim's valid Facebook access token and grants the victim's WordPress privileges, including administrator access when applicable.

The record

CVE
CVE-2026-18056
Published
Sep 6, 2026
Updated
Sep 7, 2026
Vendor
HivePress
Product
HivePress Authentication
Classifications
CWE-287, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HivePress · HivePress Authenticationversion=0 <=1.1.4

Published CVSS scores

7.5WordfenceCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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