CVE-2026-86801

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

The To Do List Member WordPress plugin from 1.4 through 1.6 ships a file upload endpoint that does not load WordPress and therefore applies no authentication, capability or nonce check of any kind, and validates only the name of an uploaded file rather than its content, allowing unauthenticated users to store active content served from the site's own origin, and to list and delete the files already staged there.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

To Do List Member 1.4 – 1.6 – Unauthenticated Stored XSS, File Listing and Deletion via Unprotected Upload Handler | CVE 2026-86801 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/baebde16-141c-4de4-8ecb-173c25bed40d/

Vendor Advisories for CVE-2026-86801(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 21× in last 7d / 21× 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. 2026-09-20 23:32 UTCEG score recompute
  2. 2026-09-20 23:32 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 10:27 UTCGHSA enrichment
  5. 2026-09-19 21:23 UTCEG score recompute
  6. 2026-09-19 21:23 UTCGHSA enrichment
  7. 2026-09-19 08:18 UTCEG score recompute
  8. 2026-09-19 08:18 UTCGHSA enrichment
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 19:14 UTCGHSA enrichment
  11. 2026-09-18 15:33 UTCGHSA enrichment
  12. 2026-09-18 02:26 UTCEG score recompute
  13. 2026-09-18 02:26 UTCGHSA enrichment
  14. 2026-09-17 19:32 UTCEPSS rescore
  15. 2026-09-17 13:21 UTCEG score recompute
  16. 2026-09-17 13:21 UTCGHSA enrichment
  17. 2026-09-17 12:53 UTCEG score recompute
  18. 2026-09-17 12:53 UTCGHSA enrichment
  19. 2026-09-17 07:27 UTCEG score recompute
  20. 2026-09-17 07:14 UTCEG score recompute
  21. 2026-09-17 07:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86801?
CVE-2026-86801 is a high vulnerability published on September 17, 2026. The To Do List Member WordPress plugin from 1.4 through 1.6 ships a file upload endpoint that does not load WordPress and therefore applies no authentication, capability or nonce check of any kind, and validates only the name of an uploaded file rather than its content, allowing unauthenticated…
When was CVE-2026-86801 disclosed?
CVE-2026-86801 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86801 actively exploited?
CVE-2026-86801 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 73.0% of all scored CVEs.
What is the CVSS score of CVE-2026-86801?
CVE-2026-86801 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-86801?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86801, 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

Explore the affected products and dependency analysis for CVE-2026-86801

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