CVE-2026-15948

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreMEDIUM confidence

Score 6.4 from GitHub Security Advisory published 2026-08-15. A secondary CVSS source baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.4Exploit: None knownExposed services: Not assessed

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

The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'first_name' parameter in all versions up to, and including, 1.2.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with host-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The tfhb_host role required to exploit this vulnerability can be self-assigned by any visitor via the plugin's public Signup shortcode, making this effectively exploitable by unauthenticated users who complete the registration flow.

CVSS v3
6.4
EG Score
6.4MEDIUMmedium confidence
EG Risk
33
EG Risk 33/100CISA SSVC

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
Severity64% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 15, 2026

Last Modified

August 20, 2026

References (5)

Vendor Advisories for CVE-2026-15948(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 12× in last 7d / 67× 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 125 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-15948?
CVE-2026-15948 is a medium vulnerability published on August 15, 2026. The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'firstname' parameter in all versions up to, and including, 1.2.2 due to insufficient input sanitization and output escaping. This makes it possible for…
When was CVE-2026-15948 disclosed?
CVE-2026-15948 was first published on August 15, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15948 actively exploited?
CVE-2026-15948 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15948?
CVE-2026-15948 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15948?
No fix for CVE-2026-15948 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-15948 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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