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VulnerabilityPublished Updated

CVE-2026-16257: Arvow AI SEO Writer (WordPress plugin) · Improper Authentication

Affects Arvow AI SEO Writer (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 8.2 High : upgrade to 1.5.4 soon.

Data as of 8 Nov 2026, 23:24 UTC

CVSS 3.1 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Upgrade Arvow AI SEO Writer (WordPress plugin) to 1.5.4.

Affected software

ProductAffectedFixed in
Arvow AI SEO WriterAffected
  • <1.5.4
Fixed in
  • 1.5.4

AI-suggested

If you cannot patch yet, restricting access to the affected REST endpoint through additional access controls or disabling the plugin if not in use may reduce risk.

Description

The Arvow AI SEO Writer WordPress plugin before 1.5.4 does not properly restrict access to one of its REST endpoints, whose only access control can be bypassed by unauthenticated users through type juggling when the Arvow AI SEO Writer WordPress plugin before 1.5.4 has not been configured, allowing them to create arbitrary posts and pages and to disclose author account and taxonomy information.

References

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