CVE-2026-16300

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

The ChamaWP WordPress plugin before 1.0.13 does not properly validate a password reset request, allowing unauthenticated attackers to reset the password of arbitrary users, including administrators, which could lead to a full site takeover.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 3, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Chama < 1.0.13 – Unauthenticated Arbitrary User Password Reset | CVE 2026-16300 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/0508f8c8-8ecc-4982-b14c-bf5f1c3d1c8f/

Vendor Advisories for CVE-2026-16300(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 58× in last 7d / 154× 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 154 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16300?
CVE-2026-16300 is a critical vulnerability published on August 3, 2026. The ChamaWP WordPress plugin before 1.0.13 does not properly validate a password reset request, allowing unauthenticated attackers to reset the password of arbitrary users, including administrators, which could lead to a full site takeover.
When was CVE-2026-16300 disclosed?
CVE-2026-16300 was first published in the National Vulnerability Database on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16300 actively exploited?
CVE-2026-16300 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 77.0% of all scored CVEs.
What is the CVSS score of CVE-2026-16300?
CVE-2026-16300 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16300?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16300, 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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