CVE-2026-8378

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-06-23. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Elevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

The Frontend File Manager Plugin WordPress plugin through 23.6 does not sanitise nor escape a filename submitted to the frontend file-rename endpoint before storing it as post meta and rendering it back on the admin File Manager listing, leading to a Stored Cross-Site Scripting vulnerability exploitable by users with Subscriber-level access and above against an administrator viewing the file management interface.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

June 23, 2026

Last Modified

June 23, 2026

Advisory Details (1)

Auto-updated Jun 23, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Frontend File Manager Plugin <= 23.6 – Subscriber+ Stored Cross-Site Scripting via File Rename | CVE 2026-8378 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/19f5dd94-b16c-4ad2-9586-d15ddecf9805/

Vendor Advisories for CVE-2026-8378(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 4× in last 7d / 48× 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.

Showing the most recent 100 of 157 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-08 22:01 UTCEPSS rescore
  3. 2026-09-06 13:48 UTCEPSS rescore
  4. 2026-09-05 15:31 UTCEPSS rescore
  5. 2026-09-04 05:07 UTCEPSS rescore
  6. 2026-09-02 14:12 UTCEPSS rescore
  7. 2026-09-01 13:54 UTCEPSS rescore
  8. 2026-09-01 04:40 UTCEPSS rescore
  9. 2026-08-30 20:28 UTCEG score recompute
  10. 2026-08-30 20:28 UTCGHSA enrichment
  11. 2026-08-30 19:18 UTCEPSS rescore
  12. 2026-08-28 21:42 UTCEPSS rescore
  13. 2026-08-27 14:25 UTCEPSS rescore
  14. 2026-08-26 14:47 UTCEPSS rescore
  15. 2026-08-25 13:49 UTCEPSS rescore
  16. 2026-08-24 22:13 UTCEG score recompute
  17. 2026-08-24 22:13 UTCGHSA enrichment
  18. 2026-08-24 14:18 UTCEPSS rescore
  19. 2026-08-23 15:23 UTCEG score recompute
  20. 2026-08-23 15:23 UTCGHSA enrichment
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 14:01 UTCEG score recompute
  23. 2026-08-22 14:01 UTCGHSA enrichment
  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-21 09:24 UTCEG score recompute
Show 75 more
  1. 2026-08-21 09:24 UTCGHSA enrichment
  2. 2026-08-20 22:56 UTCEPSS rescore
  3. 2026-08-20 07:49 UTCEG score recompute
  4. 2026-08-20 07:49 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 04:50 UTCEG score recompute
  7. 2026-08-19 04:50 UTCGHSA enrichment
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-17 08:12 UTCEG score recompute
  10. 2026-08-17 08:12 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 06:51 UTCEG score recompute
  14. 2026-08-16 06:51 UTCGHSA enrichment
  15. 2026-08-16 02:15 UTCEPSS rescore
  16. 2026-08-15 05:31 UTCEG score recompute
  17. 2026-08-15 05:31 UTCGHSA enrichment
  18. 2026-08-15 01:31 UTCEPSS rescore
  19. 2026-08-14 04:08 UTCEG score recompute
  20. 2026-08-14 04:08 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 02:48 UTCEG score recompute
  23. 2026-08-13 02:48 UTCGHSA enrichment
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-12 01:28 UTCEG score recompute
  26. 2026-08-12 01:28 UTCGHSA enrichment
  27. 2026-08-11 13:43 UTCEPSS rescore
  28. 2026-08-11 00:08 UTCEG score recompute
  29. 2026-08-11 00:08 UTCGHSA enrichment
  30. 2026-08-11 00:00 UTCEPSS rescore
  31. 2026-08-09 22:49 UTCEG score recompute
  32. 2026-08-09 22:49 UTCGHSA enrichment
  33. 2026-08-09 13:47 UTCEPSS rescore
  34. 2026-08-08 21:29 UTCEG score recompute
  35. 2026-08-08 21:29 UTCGHSA enrichment
  36. 2026-08-08 16:37 UTCEPSS rescore
  37. 2026-08-07 20:08 UTCEG score recompute
  38. 2026-08-07 20:08 UTCGHSA enrichment
  39. 2026-08-06 18:48 UTCEG score recompute
  40. 2026-08-06 18:48 UTCGHSA enrichment
  41. 2026-08-06 13:47 UTCEPSS rescore
  42. 2026-08-05 19:17 UTCEPSS rescore
  43. 2026-08-05 19:17 UTCEPSS rescore
  44. 2026-08-05 17:28 UTCGHSA enrichment
  45. 2026-08-04 15:15 UTCEG score recompute
  46. 2026-08-04 15:15 UTCGHSA enrichment
  47. 2026-08-04 15:10 UTCEPSS rescore
  48. 2026-08-04 10:39 UTCEPSS rescore
  49. 2026-08-03 10:36 UTCEPSS rescore
  50. 2026-08-03 08:00 UTCGHSA enrichment
  51. 2026-08-02 06:40 UTCEG score recompute
  52. 2026-08-02 06:40 UTCGHSA enrichment
  53. 2026-08-02 02:27 UTCEPSS rescore
  54. 2026-08-01 05:20 UTCEG score recompute
  55. 2026-08-01 05:20 UTCGHSA enrichment
  56. 2026-08-01 04:16 UTCEPSS rescore
  57. 2026-07-31 04:00 UTCEG score recompute
  58. 2026-07-31 04:00 UTCGHSA enrichment
  59. 2026-07-30 16:28 UTCEPSS rescore
  60. 2026-07-30 02:40 UTCEG score recompute
  61. 2026-07-30 02:40 UTCGHSA enrichment
  62. 2026-07-30 01:30 UTCEPSS rescore
  63. 2026-07-29 01:18 UTCEG score recompute
  64. 2026-07-29 01:18 UTCGHSA enrichment
  65. 2026-07-28 15:37 UTCEPSS rescore
  66. 2026-07-27 17:56 UTCEG score recompute
  67. 2026-07-27 17:56 UTCGHSA enrichment
  68. 2026-07-27 14:14 UTCEPSS rescore
  69. 2026-07-26 15:55 UTCEG score recompute
  70. 2026-07-26 15:55 UTCGHSA enrichment
  71. 2026-07-25 14:18 UTCEPSS rescore
  72. 2026-07-24 14:18 UTCEPSS rescore
  73. 2026-07-23 14:18 UTCEPSS rescore
  74. 2026-07-23 03:23 UTCEG score recompute
  75. 2026-07-22 14:08 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-8378?
CVE-2026-8378 is a medium vulnerability published on June 23, 2026. The Frontend File Manager Plugin WordPress plugin through 23.6 does not sanitise nor escape a filename submitted to the frontend file-rename endpoint before storing it as post meta and rendering it back on the admin File Manager listing, leading to a Stored Cross-Site Scripting vulnerability…
When was CVE-2026-8378 disclosed?
CVE-2026-8378 was first published in the National Vulnerability Database on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8378 actively exploited?
CVE-2026-8378 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 86.8% of all scored CVEs.
What is the CVSS score of CVE-2026-8378?
CVE-2026-8378 has a CVSS v3.1 base score of 5.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-8378?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8378, 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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