CVE-2026-16548

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

The Chat Widget: Floating Customer Support Button for 30+ Channels, Supporting SMS, Calls, and Chat WordPress plugin before 1.8.2 does not validate the type, extension, content, or size of files submitted to its public response endpoint and stores them under the uploads directory, so an unauthenticated user can upload arbitrary files. The original extension is discarded (files are stored under a bare UUID), so this does not yield code execution or stored XSS; impact is bounded to disk consumption and content hosting. The storing path requires the channel's response storage or mail-forwarding to be configured.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Bit Assist < 1.8.2 – Unauthenticated Arbitrary File Upload via Response Endpoint | CVE 2026-16548 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/14d5f86b-f0ab-4920-99d0-8e2a66486232/

Vendor Advisories for CVE-2026-16548(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 13× in last 7d / 71× 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 130 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16548?
CVE-2026-16548 is a medium vulnerability published on August 4, 2026. The Chat Widget: Floating Customer Support Button for 30+ Channels, Supporting SMS, Calls, and Chat WordPress plugin before 1.8.2 does not validate the type, extension, content, or size of files submitted to its public response endpoint and stores them under the uploads directory, so an…
When was CVE-2026-16548 disclosed?
CVE-2026-16548 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16548 actively exploited?
CVE-2026-16548 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 69.8% of all scored CVEs.
What is the CVSS score of CVE-2026-16548?
CVE-2026-16548 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16548?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16548, 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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