CVE-2026-52837

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 54% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.9Exploit: Elevated riskExposed: 0

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

Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, the booking reschedule view at /index.php/booking/reschedule/{appointment_hash} (handled by Booking::index()) embeds the entire customer record as inline JavaScript (const vars = {... "customer_data": {...}, ...}) without authentication and without field whitelisting. Anyone in possession of the 12-character appointment_hash — which appears in plain text in reschedule emails, confirmation page URLs, and operator-side calendar links — can read every column of that customer's row in the ea_users table. Version 1.6.0 contains a patch.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
62(Attend)
EG Risk 62/100SSVC: Attend

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
Severity69% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 29, 2026

Advisory Details (2)

Auto-updated Jul 14, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github Patch Available🟡 PoC Available

Unauthenticated customer PII disclosure on booking reschedule page · Advisory · alextselegidis/easyappointments · GitHub

https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-xgr6-pqjv-3pf8
github_commit Patch Available

commit 629a0415f54f (alextselegidis/easyappointments)

Patch available: alextselegidis/easyappointments 1.6.0 (contains commit 629a0415f54f)

https://github.com/alextselegidis/easyappointments/commit/629a0415f54f75556c17f4f5d9c77fda1fdbdeae

Vendor Advisories for CVE-2026-52837(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composeralextselegidis/easyappointments—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
alextselegidis/easyappointments1.1.0 ... 1.5.2 (24 versions)——

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 49× 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 134 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-52837?
CVE-2026-52837 is a medium vulnerability published on July 14, 2026. Easy!Appointments is a self hosted appointment scheduler. In versions up to and including 1.5.2, the booking reschedule view at /index.php/booking/reschedule/{appointmenthash} (handled by Booking::index()) embeds the entire customer record as inline JavaScript (const vars = {... "customerdata":…
When was CVE-2026-52837 disclosed?
CVE-2026-52837 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52837 actively exploited?
CVE-2026-52837 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52837?
CVE-2026-52837 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-52837?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52837, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-52837

Explore →

Is Your Infrastructure Affected by CVE-2026-52837?

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

Start Free Scan →Browse All CVEs