CVE-2026-66469Network attack vectorHinoki check available

Unauthenticated content publishing via unset integration secret

Published Aug 13, 2026 · Updated Aug 13, 2026

Missing authorization in Arvow AI SEO Writer 1.5.3 and earlier allows remote attackers to publish WordPress content via its REST endpoint. The REST webhook accepts requests when no integration secret is configured instead of rejecting the unauthenticated call. A network request can therefore invoke the content-delivery workflow and create or modify stored WordPress content without an account.

CVSS severity7.5
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in Arvow AI SEO Writer 1.5.3 and earlier allows remote attackers to publish WordPress content via its REST endpoint. The REST webhook accepts requests when no integration secret is configured instead of rejecting the unauthenticated call. A network request can therefore invoke the content-delivery workflow and create or modify stored WordPress content without an account.

The record

CVE
CVE-2026-66469
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Arvow
Product
Arvow AI SEO Writer
Classifications
CWE-862, T1491.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 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=n/a <=1.5.3 changes=[{"at":"1.5.4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arvow · Arvow AI SEO Writerversion=n/a <=1.5.3 changes=[{"at":"1.5.4","status":"unaffected"}]

Published CVSS scores

7.5PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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-862Missing Authorization
T1491.002External Defacement

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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