CVE-2015-1840

NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 4%CVSS: —Exploit: NoneExposed: 0

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

jquery_ujs.js in jquery-rails before 3.1.3 and 4.x before 4.0.4 and rails.js in jquery-ujs before 1.0.4, as used with Ruby on Rails 3.x and 4.x, allow remote attackers to bypass the Same Origin Policy, and trigger transmission of a CSRF token to a different-domain web server, via a leading space character in a URL within an attribute value.

CVSS v3
—
EG Score
0.0(none)
EPSS
90.2%
KEV
Not listed

Published

July 26, 2015

Last Modified

May 6, 2026

References (16)

Affected Packages

(2 across 1 ecosystem)
RubyGems(2)
PackageVulnerable rangeFixed inDependents
jquery-rails4.0.0, 4.0.1, 4.0.2, 4.0.34.0.4—
jquery-ujs—1.0.4—

Data Freshness Timeline

(refreshed 9× in last 7d / 40× 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. 2026-07-16 16:59 UTCEPSS rescore
  2. 2026-07-16 16:59 UTCEPSS rescore
  3. 2026-07-15 16:54 UTCEPSS rescore
  4. 2026-07-15 16:54 UTCEPSS rescore
  5. 2026-07-15 01:56 UTCEPSS rescore
  6. 2026-07-13 22:26 UTCEPSS rescore
  7. 2026-07-12 16:07 UTCOSV refresh
  8. 2026-07-12 05:42 UTCEPSS rescore
  9. 2026-07-11 08:23 UTCEPSS rescore
  10. 2026-07-09 19:05 UTCEPSS rescore
  11. 2026-07-08 15:10 UTCEPSS rescore
  12. 2026-07-07 13:42 UTCEPSS rescore
  13. 2026-07-06 16:24 UTCEPSS rescore
  14. 2026-07-06 02:20 UTCEPSS rescore
  15. 2026-07-05 02:26 UTCEPSS rescore
  16. 2026-07-04 06:27 UTCEPSS rescore
  17. 2026-07-02 15:21 UTCEPSS rescore
  18. 2026-07-01 15:02 UTCEPSS rescore
  19. 2026-07-01 15:02 UTCEPSS rescore
  20. 2026-06-30 23:19 UTCEPSS rescore
  21. 2026-06-30 23:19 UTCEPSS rescore
  22. 2026-06-29 14:03 UTCEPSS rescore
  23. 2026-06-28 04:53 UTCEPSS rescore
  24. 2026-06-27 03:05 UTCEPSS rescore
  25. 2026-06-25 13:47 UTCEPSS rescore
Show 63 more
  1. 2026-06-25 13:47 UTCEPSS rescore
  2. 2026-06-24 14:02 UTCEPSS rescore
  3. 2026-06-24 14:02 UTCEPSS rescore
  4. 2026-06-23 21:30 UTCEPSS rescore
  5. 2026-06-23 21:29 UTCOSV refresh
  6. 2026-06-22 14:23 UTCEPSS rescore
  7. 2026-06-22 14:22 UTCEPSS rescore
  8. 2026-06-21 14:54 UTCEPSS rescore
  9. 2026-06-21 01:57 UTCEPSS rescore
  10. 2026-06-21 01:57 UTCEPSS rescore
  11. 2026-06-19 19:23 UTCEPSS rescore
  12. 2026-06-19 19:23 UTCEPSS rescore
  13. 2026-06-18 17:50 UTCEPSS rescore
  14. 2026-06-18 17:49 UTCEPSS rescore
  15. 2026-06-17 17:49 UTCEPSS rescore
  16. 2026-06-16 17:50 UTCEPSS rescore
  17. 2026-06-16 17:49 UTCEPSS rescore
  18. 2026-06-15 17:45 UTCEPSS rescore
  19. 2026-06-14 23:14 UTCEPSS rescore
  20. 2026-06-13 22:57 UTCEPSS rescore
  21. 2026-06-12 23:09 UTCEPSS rescore
  22. 2026-06-11 13:57 UTCEPSS rescore
  23. 2026-06-10 22:15 UTCEPSS rescore
  24. 2026-06-08 14:14 UTCEPSS rescore
  25. 2026-06-07 15:22 UTCEPSS rescore
  26. 2026-06-07 05:27 UTCOSV refresh
  27. 2026-06-06 13:45 UTCEPSS rescore
  28. 2026-06-05 22:44 UTCEPSS rescore
  29. 2026-06-05 06:08 UTCEPSS rescore
  30. 2026-06-05 06:08 UTCEPSS rescore
  31. 2026-06-04 13:10 UTCEPSS rescore
  32. 2026-06-04 13:09 UTCEPSS rescore
  33. 2026-06-02 20:10 UTCEPSS rescore
  34. 2026-06-02 20:10 UTCEPSS rescore
  35. 2026-06-01 13:49 UTCEPSS rescore
  36. 2026-06-01 13:49 UTCEPSS rescore
  37. 2026-05-31 22:28 UTCEPSS rescore
  38. 2026-05-31 22:28 UTCEPSS rescore
  39. 2026-05-31 22:28 UTCEPSS rescore
  40. 2026-05-31 00:14 UTCEPSS rescore
  41. 2026-05-29 13:41 UTCEPSS rescore
  42. 2026-05-28 13:42 UTCEPSS rescore
  43. 2026-05-28 13:42 UTCEPSS rescore
  44. 2026-05-27 13:38 UTCEPSS rescore
  45. 2026-05-27 13:38 UTCEPSS rescore
  46. 2026-05-26 13:41 UTCEPSS rescore
  47. 2026-05-26 13:41 UTCEPSS rescore
  48. 2026-05-26 07:16 UTCEPSS rescore
  49. 2026-05-26 07:16 UTCEPSS rescore
  50. 2026-05-24 16:43 UTCEPSS rescore
  51. 2026-05-23 15:10 UTCEPSS rescore
  52. 2026-05-23 00:22 UTCEG score recompute
  53. 2026-05-22 21:15 UTCEPSS rescore
  54. 2026-05-22 21:15 UTCEPSS rescore
  55. 2026-05-21 22:40 UTCEPSS rescore
  56. 2026-05-20 22:37 UTCEPSS rescore
  57. 2026-05-20 22:37 UTCEPSS rescore
  58. 2026-05-20 11:21 UTCEPSS rescore
  59. 2026-05-20 11:21 UTCEPSS rescore
  60. 2026-05-20 11:21 UTCEPSS rescore
  61. 2026-05-19 14:03 UTCOSV refresh
  62. 2026-05-18 21:30 UTCEPSS rescore
  63. 2026-05-18 21:30 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-1840?
CVE-2015-1840 is a none vulnerability published on July 26, 2015. jquery_ujs.js in jquery-rails before 3.1.3 and 4.x before 4.0.4 and rails.js in jquery-ujs before 1.0.4, as used with Ruby on Rails 3.x and 4.x, allow remote attackers to bypass the Same Origin Policy, and trigger transmission of a CSRF token to a different-domain web server, via a leading space…
When was CVE-2015-1840 disclosed?
CVE-2015-1840 was first published in the National Vulnerability Database on July 26, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-1840 actively exploited?
CVE-2015-1840 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2015-1840?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-1840, 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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