CVE-2026-17586

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreHIGH confidence

Score 6.4 from GitHub Security Advisory published 2026-09-18. A secondary CVSS source baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.4Exploit: None knownExposed services: Not assessed

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

The VK All in One Expansion Unit plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'vkExUnit_cta_img_position' Post Meta in all versions up to, and including, 9.118.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The sanitize_text_field callback applied on save does not strip double-quote characters or on* event-handler attributes, and the output filter Vk_Call_To_Action::safe_kses_post() only rewrites disallowed iframe elements while returning all other content verbatim, leaving the injected payload intact in the rendered HTML.

CVSS v3
6.4
EG Score
6.4MEDIUMhigh confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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
Severity64% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 18, 2026

Last Modified

September 18, 2026

References (10)

Vendor Advisories for CVE-2026-17586(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 / 52× 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. 2026-10-05 05:19 UTCEG score recompute
  2. 2026-10-05 05:19 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 05:54 UTCEG score recompute
  5. 2026-10-04 05:54 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 06:31 UTCEG score recompute
  8. 2026-10-03 06:31 UTCGHSA enrichment
  9. 2026-10-02 07:07 UTCEG score recompute
  10. 2026-10-02 07:06 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 07:42 UTCEG score recompute
  13. 2026-10-01 07:42 UTCGHSA enrichment
  14. 2026-09-30 15:02 UTCEPSS rescore
  15. 2026-09-30 08:18 UTCEG score recompute
  16. 2026-09-30 08:18 UTCGHSA enrichment
  17. 2026-09-29 15:20 UTCEPSS rescore
  18. 2026-09-29 08:54 UTCEG score recompute
  19. 2026-09-29 08:54 UTCGHSA enrichment
  20. 2026-09-28 13:51 UTCEPSS rescore
  21. 2026-09-28 09:30 UTCEG score recompute
  22. 2026-09-28 09:30 UTCGHSA enrichment
  23. 2026-09-27 13:47 UTCEPSS rescore
  24. 2026-09-27 10:06 UTCEG score recompute
  25. 2026-09-27 10:06 UTCGHSA enrichment
Show 27 more
  1. 2026-09-26 15:58 UTCEPSS rescore
  2. 2026-09-26 10:42 UTCEG score recompute
  3. 2026-09-26 10:42 UTCGHSA enrichment
  4. 2026-09-25 11:13 UTCEG score recompute
  5. 2026-09-25 11:13 UTCGHSA enrichment
  6. 2026-09-24 11:49 UTCEG score recompute
  7. 2026-09-24 11:49 UTCGHSA enrichment
  8. 2026-09-23 12:25 UTCEG score recompute
  9. 2026-09-23 12:25 UTCGHSA enrichment
  10. 2026-09-22 13:01 UTCEG score recompute
  11. 2026-09-22 13:01 UTCGHSA enrichment
  12. 2026-09-21 13:37 UTCEG score recompute
  13. 2026-09-21 13:37 UTCGHSA enrichment
  14. 2026-09-20 14:13 UTCEG score recompute
  15. 2026-09-20 14:13 UTCGHSA enrichment
  16. 2026-09-19 14:49 UTCEG score recompute
  17. 2026-09-19 14:49 UTCGHSA enrichment
  18. 2026-09-18 19:27 UTCEPSS rescore
  19. 2026-09-18 15:25 UTCEG score recompute
  20. 2026-09-18 15:25 UTCGHSA enrichment
  21. 2026-09-18 14:54 UTCEG score recompute
  22. 2026-09-18 14:54 UTCGHSA enrichment
  23. 2026-09-18 13:39 UTCEG score recompute
  24. 2026-09-18 13:39 UTCGHSA enrichment
  25. 2026-09-18 08:27 UTCEG score recompute
  26. 2026-09-18 07:49 UTCEG score recompute
  27. 2026-09-18 07:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-17586?
CVE-2026-17586 is a medium vulnerability published on September 18, 2026. The VK All in One Expansion Unit plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'vkExUnitctaimgposition' Post Meta in all versions up to, and including, 9.118.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers,…
When was CVE-2026-17586 disclosed?
CVE-2026-17586 was first published 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-2026-17586 actively exploited?
CVE-2026-17586 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-17586?
CVE-2026-17586 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-17586?
No fix for CVE-2026-17586 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-17586 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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