CVE-2026-87797

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

The Sprout Invoices WordPress plugin before 20.8.16 does not perform a capability or ownership check before allowing a private note to be overwritten through one of its AJAX actions, allowing any authenticated user such as a subscriber to overwrite private notes on records belonging to other users.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

September 12, 2026

Last Modified

September 14, 2026

Advisory Details (1)

Auto-updated Sep 12, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Client Invoicing by Sprout Invoices < 20.8.16 – Subscriber+ Private Note Overwrite via si_edit_private_note | CVE 2026-87797 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/ded55e47-568d-4702-b043-4707e4182a09/

Vendor Advisories for CVE-2026-87797(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 18× in last 7d / 39× 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. 2026-09-24 14:04 UTCEPSS rescore
  2. 2026-09-24 13:38 UTCEG score recompute
  3. 2026-09-24 13:38 UTCGHSA enrichment
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 11:51 UTCEG score recompute
  6. 2026-09-23 11:51 UTCGHSA enrichment
  7. 2026-09-22 16:01 UTCEPSS rescore
  8. 2026-09-22 10:03 UTCEG score recompute
  9. 2026-09-22 10:03 UTCGHSA enrichment
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-21 08:16 UTCEG score recompute
  12. 2026-09-21 08:16 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 06:30 UTCEG score recompute
  15. 2026-09-20 06:29 UTCGHSA enrichment
  16. 2026-09-19 04:38 UTCEG score recompute
  17. 2026-09-19 04:38 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 02:51 UTCEG score recompute
  20. 2026-09-18 02:51 UTCGHSA enrichment
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-17 01:04 UTCEG score recompute
  23. 2026-09-17 01:04 UTCGHSA enrichment
  24. 2026-09-16 14:09 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 14 more
  1. 2026-09-15 23:17 UTCEG score recompute
  2. 2026-09-15 23:17 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-14 21:18 UTCGHSA enrichment
  5. 2026-09-14 19:57 UTCGHSA enrichment
  6. 2026-09-13 18:10 UTCEG score recompute
  7. 2026-09-13 18:10 UTCGHSA enrichment
  8. 2026-09-12 16:23 UTCGHSA enrichment
  9. 2026-09-12 15:44 UTCEG score recompute▲ 4.30
  10. 2026-09-12 15:44 UTCGHSA enrichment
  11. 2026-09-12 15:43 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  12. 2026-09-12 06:20 UTCNVD update
  13. 2026-09-12 06:14 UTCEG score recompute
  14. 2026-09-12 06:13 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87797?
CVE-2026-87797 is a medium vulnerability published on September 12, 2026. The Sprout Invoices WordPress plugin before 20.8.16 does not perform a capability or ownership check before allowing a private note to be overwritten through one of its AJAX actions, allowing any authenticated user such as a subscriber to overwrite private notes on records belonging to other users.
When was CVE-2026-87797 disclosed?
CVE-2026-87797 was first published in the National Vulnerability Database on September 12, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87797 actively exploited?
CVE-2026-87797 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 84.9% of all scored CVEs.
What is the CVSS score of CVE-2026-87797?
CVE-2026-87797 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-87797?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87797, 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-2026-87797

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