CVE-2026-39527

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-06-15. the CNA's CVSS baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:patchstack, epss, ghsa
Trending — 3 sources updated this week
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

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

Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.

CVSS v3
5.4
EG Score
5.4(high)
EPSS
20.9%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 15, 2026

Advisory Details (1)

Auto-updated Jun 21, 2026
No patch confirmed yet.
generic

Arbitrary File Upload in WordPress WpStream Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/wpstream/vulnerability/wordpress-wpstream-plugin-4-11-2-arbitrary-file-upload-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-39527(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 22× in last 7d / 70× 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. 2026-07-07 00:07 UTCEG score recompute
  2. 2026-07-07 00:06 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 20:40 UTCEG score recompute
  8. 2026-07-05 20:40 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 20:48 UTCEG score recompute
  11. 2026-07-04 20:48 UTCGHSA enrichment
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-03 20:57 UTCEG score recompute
  14. 2026-07-03 20:57 UTCGHSA enrichment
  15. 2026-07-02 21:04 UTCEG score recompute
  16. 2026-07-02 21:04 UTCGHSA enrichment
  17. 2026-07-01 21:12 UTCEG score recompute
  18. 2026-07-01 21:12 UTCGHSA enrichment
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-30 21:20 UTCEG score recompute
  22. 2026-06-30 21:20 UTCGHSA enrichment
  23. 2026-06-29 21:27 UTCEG score recompute
  24. 2026-06-29 21:27 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 45 more
  1. 2026-06-28 21:36 UTCEG score recompute
  2. 2026-06-28 21:36 UTCGHSA enrichment
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 21:44 UTCEG score recompute
  6. 2026-06-27 21:44 UTCGHSA enrichment
  7. 2026-06-27 03:08 UTCEPSS rescore
  8. 2026-06-26 21:52 UTCEG score recompute
  9. 2026-06-26 21:52 UTCGHSA enrichment
  10. 2026-06-25 22:01 UTCEG score recompute
  11. 2026-06-25 22:01 UTCGHSA enrichment
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-24 22:09 UTCEG score recompute
  15. 2026-06-24 22:08 UTCGHSA enrichment
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 22:17 UTCEG score recompute
  18. 2026-06-23 22:17 UTCGHSA enrichment
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-22 21:46 UTCEG score recompute
  21. 2026-06-22 21:46 UTCGHSA enrichment
  22. 2026-06-22 14:25 UTCEPSS rescore
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-21 21:49 UTCEG score recompute
  25. 2026-06-21 21:48 UTCGHSA enrichment
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 14:56 UTCEPSS rescore
  28. 2026-06-21 01:59 UTCEPSS rescore
  29. 2026-06-20 21:13 UTCEG score recompute
  30. 2026-06-20 21:13 UTCGHSA enrichment
  31. 2026-06-19 21:21 UTCEG score recompute
  32. 2026-06-19 21:21 UTCGHSA enrichment
  33. 2026-06-19 19:25 UTCEPSS rescore
  34. 2026-06-18 21:28 UTCEG score recompute
  35. 2026-06-18 21:27 UTCGHSA enrichment
  36. 2026-06-18 17:52 UTCEPSS rescore
  37. 2026-06-18 17:52 UTCEPSS rescore
  38. 2026-06-17 21:35 UTCEG score recompute
  39. 2026-06-17 21:35 UTCGHSA enrichment
  40. 2026-06-17 17:53 UTCEPSS rescore
  41. 2026-06-16 21:43 UTCEG score recompute
  42. 2026-06-16 21:43 UTCGHSA enrichment
  43. 2026-06-16 17:52 UTCEPSS rescore
  44. 2026-06-15 21:51 UTCEG score recompute
  45. 2026-06-15 21:51 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39527?
CVE-2026-39527 is a medium vulnerability published on June 15, 2026. Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.
When was CVE-2026-39527 disclosed?
CVE-2026-39527 was first published in the National Vulnerability Database on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39527 actively exploited?
CVE-2026-39527 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39527?
CVE-2026-39527 has a CVSS v4.0 base score of 5.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-39527?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39527, 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-2026-39527

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