CVE-2026-81021

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

The SupportCandy WordPress plugin before 3.5.3 does not perform an authorization check on one of its support-ticket attachment download paths, allowing unauthenticated attackers to read protected customer-uploaded attachments by enumerating sequential attachment identifiers.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

SupportCandy 3.2.9 – 3.5.2 – Unauthenticated Ticket Attachment Disclosure | CVE 2026-81021 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/c2e643fc-1d6d-429d-b2f6-d71a558bccaf/

Vendor Advisories for CVE-2026-81021(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 20× in last 7d / 53× 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. 2026-09-25 04:40 UTCEG score recompute
  2. 2026-09-25 04:40 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 05:26 UTCEG score recompute
  5. 2026-09-24 05:26 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 06:12 UTCEG score recompute
  8. 2026-09-23 06:12 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 06:57 UTCEG score recompute
  11. 2026-09-22 06:57 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 07:43 UTCEG score recompute
  14. 2026-09-21 07:43 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 08:29 UTCEG score recompute
  17. 2026-09-20 08:29 UTCGHSA enrichment
  18. 2026-09-19 09:14 UTCEG score recompute
  19. 2026-09-19 09:14 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 09:59 UTCEG score recompute
  22. 2026-09-18 09:59 UTCGHSA enrichment
  23. 2026-09-17 10:45 UTCEG score recompute
  24. 2026-09-17 10:44 UTCGHSA enrichment
  25. 2026-09-16 14:08 UTCEPSS rescore
Show 28 more
  1. 2026-09-16 11:26 UTCEG score recompute
  2. 2026-09-16 11:26 UTCGHSA enrichment
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-15 12:08 UTCEG score recompute
  5. 2026-09-15 12:08 UTCGHSA enrichment
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-15 03:12 UTCEPSS rescore
  8. 2026-09-14 12:53 UTCEG score recompute
  9. 2026-09-14 12:53 UTCGHSA enrichment
  10. 2026-09-13 13:39 UTCEG score recompute
  11. 2026-09-13 13:39 UTCGHSA enrichment
  12. 2026-09-12 14:24 UTCGHSA enrichment
  13. 2026-09-11 15:09 UTCEG score recompute
  14. 2026-09-11 15:09 UTCGHSA enrichment
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-10 15:54 UTCEG score recompute
  18. 2026-09-10 15:54 UTCGHSA enrichment
  19. 2026-09-09 16:39 UTCGHSA enrichment
  20. 2026-09-09 16:27 UTCNVD updateCVSS v3 → 5.3 · severity → MEDIUM
  21. 2026-09-09 15:47 UTCNVD update
  22. 2026-09-09 15:46 UTCEG score recompute▲ 5.30
  23. 2026-09-09 15:46 UTCGHSA enrichment
  24. 2026-09-09 15:44 UTCMITRE cvelistV5CVSS v3 → 5.3 · severity → MEDIUM
  25. 2026-09-09 06:31 UTCGHSA enrichment
  26. 2026-09-09 06:31 UTCNVD update
  27. 2026-09-09 06:04 UTCEG score recompute
  28. 2026-09-09 06:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81021?
CVE-2026-81021 is a medium vulnerability published on September 9, 2026. The SupportCandy WordPress plugin before 3.5.3 does not perform an authorization check on one of its support-ticket attachment download paths, allowing unauthenticated attackers to read protected customer-uploaded attachments by enumerating sequential attachment identifiers.
When was CVE-2026-81021 disclosed?
CVE-2026-81021 was first published in the National Vulnerability Database on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81021 actively exploited?
CVE-2026-81021 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 74.8% of all scored CVEs.
What is the CVSS score of CVE-2026-81021?
CVE-2026-81021 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-81021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81021, 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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