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: 0.3%, top 83% 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
17%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 11, 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 19× in last 7d / 53× 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. 2026-08-19 23:21 UTCEG score recompute
  2. 2026-08-19 23:21 UTCGHSA enrichment
  3. 2026-08-19 17:03 UTCEPSS rescore
  4. 2026-08-18 22:15 UTCEG score recompute
  5. 2026-08-18 22:15 UTCGHSA enrichment
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-17 21:06 UTCEG score recompute
  8. 2026-08-17 21:06 UTCGHSA enrichment
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-16 20:00 UTCEG score recompute
  11. 2026-08-16 20:00 UTCGHSA enrichment
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 02:14 UTCEPSS rescore
  14. 2026-08-15 18:54 UTCEG score recompute
  15. 2026-08-15 18:54 UTCGHSA enrichment
  16. 2026-08-15 01:30 UTCEPSS rescore
  17. 2026-08-14 17:48 UTCEG score recompute
  18. 2026-08-14 17:48 UTCGHSA enrichment
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-13 16:41 UTCGHSA enrichment
  21. 2026-08-12 15:30 UTCEG score recompute
  22. 2026-08-12 15:30 UTCGHSA enrichment
  23. 2026-08-12 13:50 UTCEPSS rescore
  24. 2026-08-11 14:24 UTCGHSA enrichment
  25. 2026-08-11 14:06 UTCEG score recompute▲ 1.10
Show 28 more
  1. 2026-08-11 14:05 UTCGHSA enrichment
  2. 2026-08-11 14:03 UTCGHSA enrichment
  3. 2026-08-11 14:02 UTCMITRE cvelistV5CVSS v3 → 6.5
  4. 2026-08-11 13:42 UTCEPSS rescore
  5. 2026-08-11 00:00 UTCEPSS rescore
  6. 2026-08-10 21:59 UTCGHSA enrichment
  7. 2026-08-09 20:52 UTCEG score recompute
  8. 2026-08-09 20:52 UTCGHSA enrichment
  9. 2026-08-09 13:46 UTCEPSS rescore
  10. 2026-08-08 19:46 UTCEG score recompute
  11. 2026-08-08 19:46 UTCGHSA enrichment
  12. 2026-08-08 16:37 UTCEPSS rescore
  13. 2026-08-07 18:39 UTCGHSA enrichment
  14. 2026-08-06 17:33 UTCEG score recompute
  15. 2026-08-06 17:33 UTCGHSA enrichment
  16. 2026-08-06 13:46 UTCEPSS rescore
  17. 2026-08-05 19:17 UTCEPSS rescore
  18. 2026-08-05 16:26 UTCEG score recompute
  19. 2026-08-05 16:26 UTCGHSA enrichment
  20. 2026-08-04 15:20 UTCEG score recompute
  21. 2026-08-04 15:20 UTCGHSA enrichment
  22. 2026-08-04 15:10 UTCEPSS rescore
  23. 2026-08-04 14:48 UTCEG score recompute▲ 5.40
  24. 2026-08-04 14:48 UTCGHSA enrichment
  25. 2026-08-04 14:47 UTCMITRE cvelistV5CVSS v3 → 5.4 · severity → MEDIUM
  26. 2026-08-04 07:17 UTCNVD update
  27. 2026-08-04 06:35 UTCEG score recompute
  28. 2026-08-04 06:33 UTCMITRE cvelistV5first tracked

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 11, 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 82.7% 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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