CVE-2026-16650

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-08-21. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

The Charitable WordPress plugin before 1.8.12 does not verify the authenticity of incoming Square payment webhook events in a default configuration, allowing unauthenticated attackers to forge webhook notifications that mark donations as paid without any real payment.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 21, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Aug 21, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Charitable < 1.8.12 – Unauthenticated Donation Payment-Status Manipulation via Square Webhook Signature Bypass | CVE 2026-16650 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/da611bd1-0702-4cdd-b04c-ad7210f78cfe/

Vendor Advisories for CVE-2026-16650(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 18× in last 7d / 80× 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. 2026-09-19 15:23 UTCEG score recompute
  2. 2026-09-19 15:23 UTCGHSA enrichment
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-18 14:26 UTCEG score recompute
  5. 2026-09-18 14:26 UTCGHSA enrichment
  6. 2026-09-17 13:10 UTCEG score recompute
  7. 2026-09-17 13:10 UTCGHSA enrichment
  8. 2026-09-16 14:07 UTCEPSS rescore
  9. 2026-09-16 12:14 UTCEG score recompute
  10. 2026-09-16 12:14 UTCGHSA enrichment
  11. 2026-09-16 05:14 UTCEPSS rescore
  12. 2026-09-15 11:19 UTCEG score recompute
  13. 2026-09-15 11:19 UTCGHSA enrichment
  14. 2026-09-14 10:24 UTCEG score recompute
  15. 2026-09-14 10:24 UTCGHSA enrichment
  16. 2026-09-13 16:46 UTCEPSS rescore
  17. 2026-09-13 09:29 UTCEG score recompute
  18. 2026-09-13 09:29 UTCGHSA enrichment
  19. 2026-09-12 15:00 UTCEPSS rescore
  20. 2026-09-12 08:33 UTCEG score recompute
  21. 2026-09-12 08:33 UTCGHSA enrichment
  22. 2026-09-11 14:52 UTCEPSS rescore
  23. 2026-09-11 09:36 UTCEPSS rescore
  24. 2026-09-11 07:37 UTCEG score recompute
  25. 2026-09-11 07:37 UTCGHSA enrichment
Show 55 more
  1. 2026-09-10 09:34 UTCEPSS rescore
  2. 2026-09-10 06:41 UTCGHSA enrichment
  3. 2026-09-09 05:46 UTCEG score recompute
  4. 2026-09-09 05:46 UTCGHSA enrichment
  5. 2026-09-08 22:00 UTCEPSS rescore
  6. 2026-09-08 04:50 UTCEG score recompute
  7. 2026-09-08 04:50 UTCGHSA enrichment
  8. 2026-09-07 16:01 UTCEPSS rescore
  9. 2026-09-07 03:54 UTCEG score recompute
  10. 2026-09-07 03:54 UTCGHSA enrichment
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-06 02:58 UTCEG score recompute
  13. 2026-09-06 02:58 UTCGHSA enrichment
  14. 2026-09-05 02:03 UTCEG score recompute
  15. 2026-09-05 02:03 UTCGHSA enrichment
  16. 2026-09-04 05:06 UTCEPSS rescore
  17. 2026-09-04 01:07 UTCGHSA enrichment
  18. 2026-09-03 00:08 UTCEG score recompute
  19. 2026-09-03 00:08 UTCGHSA enrichment
  20. 2026-09-02 14:11 UTCEPSS rescore
  21. 2026-09-01 23:09 UTCEG score recompute
  22. 2026-09-01 23:09 UTCGHSA enrichment
  23. 2026-09-01 13:53 UTCEPSS rescore
  24. 2026-09-01 04:39 UTCEPSS rescore
  25. 2026-08-31 22:13 UTCGHSA enrichment
  26. 2026-08-30 21:18 UTCEG score recompute
  27. 2026-08-30 21:18 UTCGHSA enrichment
  28. 2026-08-30 19:17 UTCEPSS rescore
  29. 2026-08-30 01:22 UTCEPSS rescore
  30. 2026-08-29 20:22 UTCEG score recompute
  31. 2026-08-29 20:22 UTCGHSA enrichment
  32. 2026-08-28 21:41 UTCEPSS rescore
  33. 2026-08-28 19:26 UTCGHSA enrichment
  34. 2026-08-27 18:18 UTCEG score recompute
  35. 2026-08-27 18:18 UTCGHSA enrichment
  36. 2026-08-27 14:25 UTCEPSS rescore
  37. 2026-08-26 16:47 UTCEG score recompute
  38. 2026-08-26 16:47 UTCGHSA enrichment
  39. 2026-08-26 14:46 UTCEPSS rescore
  40. 2026-08-25 17:06 UTCEG score recompute
  41. 2026-08-25 17:05 UTCGHSA enrichment
  42. 2026-08-25 13:48 UTCEPSS rescore
  43. 2026-08-24 16:10 UTCEG score recompute
  44. 2026-08-24 16:10 UTCGHSA enrichment
  45. 2026-08-23 15:13 UTCEG score recompute
  46. 2026-08-23 15:13 UTCGHSA enrichment
  47. 2026-08-23 00:19 UTCEPSS rescore
  48. 2026-08-22 14:17 UTCGHSA enrichment
  49. 2026-08-21 13:20 UTCEG score recompute
  50. 2026-08-21 13:20 UTCGHSA enrichment
  51. 2026-08-21 13:09 UTCEG score recompute
  52. 2026-08-21 13:09 UTCGHSA enrichment
  53. 2026-08-21 12:19 UTCEG score recompute
  54. 2026-08-21 11:55 UTCEG score recompute
  55. 2026-08-21 11:54 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-16650?
CVE-2026-16650 is a medium vulnerability published on August 21, 2026. The Charitable WordPress plugin before 1.8.12 does not verify the authenticity of incoming Square payment webhook events in a default configuration, allowing unauthenticated attackers to forge webhook notifications that mark donations as paid without any real payment.
When was CVE-2026-16650 disclosed?
CVE-2026-16650 was first published in the National Vulnerability Database on August 21, 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-2026-16650 actively exploited?
CVE-2026-16650 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 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-16650?
CVE-2026-16650 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-16650?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16650, 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-2026-16650

Explore →

Is Your Infrastructure Affected by CVE-2026-16650?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs