CVE-2026-42840

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 85% 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
5.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.1Exploit: NoneExposed: 0

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

An authenticated user can persist arbitrary HTML/JavaScript in the email_id or mobile_no fields of a Customer record and trigger unescaped rendering in the Point of Sale (POS) interface for every operator who selects that customer. This issue affects ERPNext: 16.16.0.

CVSS v3
5.1
EG Score
5.1(medium)
EPSS
15.4%
KEV
Not listed

Published

June 3, 2026

Last Modified

June 4, 2026

Advisory Details (2)

Auto-updated Jun 13, 2026
No patch confirmed yet.
generic

ERPNext 16.16.0 - Stored XSS in POS customer section via unescaped template literals | Fluid Attacks

https://fluidattacks.com/es/advisories/weeknd
generic

GitHub - frappe/erpnext: Free and Open Source Enterprise Resource Planning (ERP) · GitHub

https://github.com/frappe/erpnext

Vendor Advisories for CVE-2026-42840(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 11× in last 7d / 71× 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 113 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42840?
CVE-2026-42840 is a medium vulnerability published on June 3, 2026. An authenticated user can persist arbitrary HTML/JavaScript in the emailid or mobileno fields of a Customer record and trigger unescaped rendering in the Point of Sale (POS) interface for every operator who selects that customer. This issue affects ERPNext: 16.16.0.
When was CVE-2026-42840 disclosed?
CVE-2026-42840 was first published in the National Vulnerability Database on June 3, 2026, with the most recent update on June 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42840 actively exploited?
CVE-2026-42840 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42840?
CVE-2026-42840 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-42840?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42840, 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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