CVE-2026-11589

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-30. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

The WP Support Plus Responsive Ticket System WordPress plugin through 9.1.2 does not properly validate uploaded files, allowing unauthenticated users to upload files containing malicious JavaScript (such as HTML or SVG) to a publicly accessible location, leading to Stored Cross-Site Scripting attacks against site users and administrators.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
19.4%
KEV
Not listed

Published

June 30, 2026

Last Modified

June 30, 2026

Advisory Details (1)

Auto-updated Jun 30, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

WP Support Plus Responsive Ticket System <= 9.1.2 – Unauthenticated Stored XSS via File Upload | CVE 2026-11589 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/c46479c2-4eef-485f-ae98-1f487efa4263/

Vendor Advisories for CVE-2026-11589(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 26× 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. 2026-07-06 20:35 UTCEG score recompute
  2. 2026-07-06 20:35 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 09:19 UTCEG score recompute
  5. 2026-07-06 09:19 UTCGHSA enrichment
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 22:02 UTCEG score recompute
  8. 2026-07-05 22:02 UTCGHSA enrichment
  9. 2026-07-05 10:47 UTCEG score recompute
  10. 2026-07-05 10:47 UTCGHSA enrichment
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 23:31 UTCEG score recompute
  14. 2026-07-04 23:31 UTCGHSA enrichment
  15. 2026-07-04 12:16 UTCEG score recompute
  16. 2026-07-04 12:16 UTCGHSA enrichment
  17. 2026-07-04 01:01 UTCEG score recompute
  18. 2026-07-04 01:00 UTCGHSA enrichment
  19. 2026-07-03 13:45 UTCEG score recompute▲ 8.80
  20. 2026-07-03 13:45 UTCGHSA enrichment
  21. 2026-07-01 15:06 UTCEPSS rescore
  22. 2026-07-01 15:06 UTCEPSS rescore
  23. 2026-06-30 23:22 UTCEPSS rescore
  24. 2026-06-30 14:32 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  25. 2026-06-30 08:33 UTCEG score recompute
Show 1 more
  1. 2026-06-30 08:31 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-11589?
CVE-2026-11589 is a high vulnerability published on June 30, 2026. The WP Support Plus Responsive Ticket System WordPress plugin through 9.1.2 does not properly validate uploaded files, allowing unauthenticated users to upload files containing malicious JavaScript (such as HTML or SVG) to a publicly accessible location, leading to Stored Cross-Site Scripting…
When was CVE-2026-11589 disclosed?
CVE-2026-11589 was first published in the National Vulnerability Database on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11589 actively exploited?
CVE-2026-11589 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11589?
CVE-2026-11589 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-11589?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11589, 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-2026-11589

Explore →

Is Your Infrastructure Affected by CVE-2026-11589?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs