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VulnerabilityPublished

CVE-2026-16041: MStore API (WordPress plugin) · Missing Authorization

Affects MStore API (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 4.21.0 soon.

Data as of 5 Nov 2026, 00:01 UTC

CVSS 3.1 base score
7.5High
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 4.21.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 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 5 Nov 2026.

What to do

Upgrade MStore API (WordPress plugin) to 4.21.0.

Affected software

ProductAffectedFixed in
MStore APIAffected
  • <4.21.0
Fixed in
  • 4.21.0

AI-suggested

If you cannot patch yet, store administrators should consider disabling the vulnerable review creation endpoint or implementing additional access controls at the web server or application firewall level to restrict unauthorized review submissions.

Description

The MStore API WordPress plugin before version 4.21.0 contains a missing authorization vulnerability in its REST product-review creation endpoint. This flaw allows unauthenticated attackers to submit WooCommerce product reviews with arbitrary reviewer names, emails, and star ratings, even on stores configured to accept reviews only from verified owners. The vulnerability is identified as CWE-862 (Missing Authorization) and has a high severity rating with a CVSS score of 7.5.

References

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