CVE-2026-16041

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-07. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The MStore API WordPress plugin before 4.21.0 does not perform authorization or purchase-ownership checks on its REST product-review creation route, allowing an unauthenticated attacker to create WooCommerce product reviews with an attacker-chosen reviewer name, email and star rating on stores configured to accept reviews only from verified owners.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

August 7, 2026

Last Modified

August 7, 2026

Advisory Details (1)

Auto-updated Aug 7, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

MStore API < 4.21.0 – Unauthenticated Product Review Creation | CVE 2026-16041 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/0e7d8a17-0901-45b5-959c-2c1ef1316047/

Vendor Advisories for CVE-2026-16041(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 29× in last 7d / 63× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 04:47 UTCEG score recompute
  2. 2026-08-21 04:47 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 17:27 UTCGHSA enrichment
  5. 2026-08-20 06:07 UTCGHSA enrichment
  6. 2026-08-19 18:47 UTCEG score recompute
  7. 2026-08-19 18:47 UTCGHSA enrichment
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-19 05:30 UTCGHSA enrichment
  10. 2026-08-18 18:11 UTCEG score recompute
  11. 2026-08-18 18:11 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 06:50 UTCGHSA enrichment
  14. 2026-08-17 19:24 UTCEG score recompute
  15. 2026-08-17 19:24 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 06:33 UTCGHSA enrichment
  18. 2026-08-16 19:10 UTCEG score recompute
  19. 2026-08-16 19:10 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 07:50 UTCEG score recompute
  22. 2026-08-16 07:50 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 20:31 UTCGHSA enrichment
  25. 2026-08-15 09:11 UTCEG score recompute
Show 38 more
  1. 2026-08-15 09:11 UTCGHSA enrichment
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 21:51 UTCGHSA enrichment
  4. 2026-08-14 10:31 UTCGHSA enrichment
  5. 2026-08-13 23:12 UTCEG score recompute
  6. 2026-08-13 23:12 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 11:52 UTCGHSA enrichment
  9. 2026-08-13 00:32 UTCEG score recompute
  10. 2026-08-13 00:32 UTCGHSA enrichment
  11. 2026-08-12 13:50 UTCEPSS rescore
  12. 2026-08-12 13:13 UTCGHSA enrichment
  13. 2026-08-12 01:53 UTCGHSA enrichment
  14. 2026-08-11 14:33 UTCEG score recompute
  15. 2026-08-11 14:33 UTCGHSA enrichment
  16. 2026-08-11 13:42 UTCEPSS rescore
  17. 2026-08-11 03:12 UTCEG score recompute
  18. 2026-08-11 03:12 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 15:53 UTCGHSA enrichment
  21. 2026-08-10 04:06 UTCGHSA enrichment
  22. 2026-08-09 16:46 UTCEG score recompute
  23. 2026-08-09 16:46 UTCGHSA enrichment
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-09 05:27 UTCGHSA enrichment
  26. 2026-08-08 18:08 UTCEG score recompute
  27. 2026-08-08 18:08 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 06:48 UTCEG score recompute
  30. 2026-08-08 06:48 UTCGHSA enrichment
  31. 2026-08-07 19:29 UTCEG score recompute
  32. 2026-08-07 19:29 UTCGHSA enrichment
  33. 2026-08-07 18:29 UTCEG score recompute▲ 7.50
  34. 2026-08-07 18:29 UTCGHSA enrichment
  35. 2026-08-07 18:28 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  36. 2026-08-07 06:20 UTCNVD update
  37. 2026-08-07 06:03 UTCEG score recompute
  38. 2026-08-07 06:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16041?
CVE-2026-16041 is a high vulnerability published on August 7, 2026. The MStore API WordPress plugin before 4.21.0 does not perform authorization or purchase-ownership checks on its REST product-review creation route, allowing an unauthenticated attacker to create WooCommerce product reviews with an attacker-chosen reviewer name, email and star rating on stores…
When was CVE-2026-16041 disclosed?
CVE-2026-16041 was first published in the National Vulnerability Database on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16041 actively exploited?
CVE-2026-16041 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.7% of all scored CVEs.
What is the CVSS score of CVE-2026-16041?
CVE-2026-16041 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16041?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16041, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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