CVE-2026-2354

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-11. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

The Swiss Toolkit For WP plugin for WordPress is vulnerable to arbitrary file upload due to a flawed file type validation bypass in the upload_extension_files() function in all versions up to, and including, 1.4.6. The upload_extension_files() function hooks into WordPress's wp_check_filetype_and_ext filter and uses strpos() to check if a filename contains a configured extension string, rather than verifying the actual file extension. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files (including PHP) on the affected site's server which may make remote code execution possible, granted the "Enhanced Multi-Format Image Support" feature is enabled with at least one extension (e.g., avif) in the allowed formats.

CVSS v3
8.8
EG Score
8.8(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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
60%
KEV
Not listed

Published

July 11, 2026

Last Modified

July 13, 2026

References (5)

Vendor Advisories for CVE-2026-2354(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 19× in last 7d / 106× 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 164 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-2354?
CVE-2026-2354 is a high vulnerability published on July 11, 2026. The Swiss Toolkit For WP plugin for WordPress is vulnerable to arbitrary file upload due to a flawed file type validation bypass in the uploadextensionfiles() function in all versions up to, and including, 1.4.6. The uploadextensionfiles() function hooks into WordPress's wpcheckfiletypeandext…
When was CVE-2026-2354 disclosed?
CVE-2026-2354 was first published in the National Vulnerability Database on July 11, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-2354 actively exploited?
CVE-2026-2354 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 40.2% of all scored CVEs.
What is the CVSS score of CVE-2026-2354?
CVE-2026-2354 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-2354?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-2354, 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.

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