CVE-2024-21496

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2024-02-17. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.1Exploit: None knownExposed: 0

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

All versions of the package github.com/greenpau/caddy-security are vulnerable to Cross-site Scripting (XSS) via the Referer header, due to improper input sanitization. Although the Referer header is sanitized by escaping some characters that can allow XSS (e.g., [&], [<], [>], ["], [']), it does not account for the attack based on the JavaScript URL scheme (e.g., javascript:alert(document.domain)// payload). Exploiting this vulnerability may not be trivial, but it could lead to the execution of malicious scripts in the context of the target user’s browser, compromising user sessions.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

February 17, 2024

Last Modified

December 23, 2025

References (6)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/greenpau/caddy-security—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)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/greenpau/caddy-security———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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 159 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2024-21496?
CVE-2024-21496 is a medium vulnerability published on February 17, 2024. All versions of the package github.com/greenpau/caddy-security are vulnerable to Cross-site Scripting (XSS) via the Referer header, due to improper input sanitization. Although the Referer header is sanitized by escaping some characters that can allow XSS (e.g., [&], [<], [>], ["], [']), it does…
When was CVE-2024-21496 disclosed?
CVE-2024-21496 was first published in the National Vulnerability Database on February 17, 2024, with the most recent update on December 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-21496 actively exploited?
CVE-2024-21496 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 53.8% of all scored CVEs.
What is the CVSS score of CVE-2024-21496?
CVE-2024-21496 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2024-21496?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21496, 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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