CVE-2026-16041: MStore API (WordPress plugin) · Missing Authorization
Affects MStore API (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 4.21.0 soon.
Data as of 5 Nov 2026, 00:01 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 7 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| MStore API | Affected
| Fixed in
|
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.