CVE-2020-37237

MEDIUMNVD 6.46.4—
EchelonGraph scoreMEDIUM confidence

Score 6.4 from GitHub Security Advisory published 2026-05-16. NVD baseline CVSS 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.4Exploit: NoneExposed: 0

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

Composr CMS 10.0.34 contains a persistent cross-site scripting vulnerability that allows authenticated administrators to inject malicious scripts through the banner management interface. Attackers with admin credentials can inject XSS payloads in the Description field of the Add banner functionality, which execute for all website visitors when they access the home page.

CVSS v3
6.4
EG Score
6.4(medium)
EPSS
14.9%
KEV
Not listed

Published

May 16, 2026

Last Modified

May 24, 2026

Advisory Details (3)

Auto-updated May 16, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Composr CMS 10.0.34 Persistent Cross-Site Scripting via banners | Advisories | VulnCheck

https://www.vulncheck.com/advisories/composr-cms-persistent-cross-site-scripting-via-banners
generic🟡 PoC Available

Composr CMS 10.0.34 - 'banners' Persistent Cross Site Scripting - PHP webapps Exploit

https://www.exploit-db.com/exploits/49190
generic

Download Composr – Composr

https://compo.sr/download.htm

Vendor Advisories for CVE-2020-37237(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 / 54× 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 164 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-37237?
CVE-2020-37237 is a medium vulnerability published on May 16, 2026. Composr CMS 10.0.34 contains a persistent cross-site scripting vulnerability that allows authenticated administrators to inject malicious scripts through the banner management interface. Attackers with admin credentials can inject XSS payloads in the Description field of the Add banner…
When was CVE-2020-37237 disclosed?
CVE-2020-37237 was first published in the National Vulnerability Database on May 16, 2026, with the most recent update on May 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37237 actively exploited?
CVE-2020-37237 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-37237?
CVE-2020-37237 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2020-37237?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37237, 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

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