CVE-2020-37256

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-06-26. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

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

Grav before 1.6.30 contains a cross-site scripting vulnerability in the Admin plugin page editor default security configuration. Privileged users with page editing capabilities can inject malicious scripts to execute arbitrary code and install malicious plugins for system access.

CVSS v3
5.4
EG Score
5.4(high)
EPSS
6.3%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 27, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
Patch available. Sources: github.
generic

Grav - Cross-Site Scripting in Admin Plugin Page Editor | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-cross-site-scripting-in-admin-plugin-page-editor
github Patch Available

XSS vulnerability in default security configuration when using Admin plugin to edit pages · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-cvmr-6428-87w9

Vendor Advisories for CVE-2020-37256(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
getgrav/grav0.8.0 ... 1.6.9 (187 versions)1.6.30—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 58× 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. 2026-07-22 22:39 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-20 17:04 UTCEPSS rescore
  6. 2026-07-20 17:04 UTCEPSS rescore
  7. 2026-07-19 14:28 UTCEPSS rescore
  8. 2026-07-19 14:28 UTCEPSS rescore
  9. 2026-07-19 02:26 UTCEPSS rescore
  10. 2026-07-19 02:26 UTCEPSS rescore
  11. 2026-07-16 16:59 UTCEPSS rescore
  12. 2026-07-16 11:11 UTCGHSA enrichment
  13. 2026-07-15 16:55 UTCEPSS rescore
  14. 2026-07-15 16:55 UTCEPSS rescore
  15. 2026-07-15 11:53 UTCGHSA enrichment
  16. 2026-07-15 01:57 UTCEPSS rescore
  17. 2026-07-14 11:40 UTCGHSA enrichment
  18. 2026-07-13 12:17 UTCGHSA enrichment
  19. 2026-07-13 06:10 UTCEPSS rescore
  20. 2026-07-13 06:10 UTCEPSS rescore
  21. 2026-07-12 12:53 UTCGHSA enrichment
  22. 2026-07-12 05:44 UTCEPSS rescore
  23. 2026-07-11 13:35 UTCGHSA enrichment
  24. 2026-07-11 08:25 UTCEPSS rescore
  25. 2026-07-11 08:25 UTCEPSS rescore
Show 33 more
  1. 2026-07-10 14:16 UTCGHSA enrichment
  2. 2026-07-09 19:07 UTCEPSS rescore
  3. 2026-07-09 14:50 UTCGHSA enrichment
  4. 2026-07-08 15:30 UTCGHSA enrichment
  5. 2026-07-08 15:12 UTCEPSS rescore
  6. 2026-07-07 16:13 UTCGHSA enrichment
  7. 2026-07-07 13:43 UTCEPSS rescore
  8. 2026-07-06 16:25 UTCEPSS rescore
  9. 2026-07-06 16:25 UTCEPSS rescore
  10. 2026-07-06 16:11 UTCGHSA enrichment
  11. 2026-07-06 02:21 UTCEPSS rescore
  12. 2026-07-06 02:21 UTCEPSS rescore
  13. 2026-07-05 16:49 UTCGHSA enrichment
  14. 2026-07-04 17:30 UTCGHSA enrichment
  15. 2026-07-04 06:29 UTCEPSS rescore
  16. 2026-07-04 06:29 UTCEPSS rescore
  17. 2026-07-03 18:11 UTCGHSA enrichment
  18. 2026-07-02 18:53 UTCGHSA enrichment
  19. 2026-07-01 19:36 UTCGHSA enrichment
  20. 2026-06-30 23:20 UTCEPSS rescore
  21. 2026-06-30 23:20 UTCEPSS rescore
  22. 2026-06-30 20:19 UTCGHSA enrichment
  23. 2026-06-29 21:01 UTCGHSA enrichment
  24. 2026-06-29 14:04 UTCEPSS rescore
  25. 2026-06-28 21:44 UTCGHSA enrichment
  26. 2026-06-28 04:54 UTCEPSS rescore
  27. 2026-06-28 04:54 UTCEPSS rescore
  28. 2026-06-27 22:26 UTCGHSA enrichment
  29. 2026-06-27 03:06 UTCEPSS rescore
  30. 2026-06-27 03:06 UTCEPSS rescore
  31. 2026-06-26 23:08 UTCGHSA enrichment
  32. 2026-06-25 23:51 UTCEG score recompute
  33. 2026-06-25 23:50 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-37256?
CVE-2020-37256 is a medium vulnerability published on June 25, 2026. Grav before 1.6.30 contains a cross-site scripting vulnerability in the Admin plugin page editor default security configuration. Privileged users with page editing capabilities can inject malicious scripts to execute arbitrary code and install malicious plugins for system access.
When was CVE-2020-37256 disclosed?
CVE-2020-37256 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37256 actively exploited?
CVE-2020-37256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-37256?
CVE-2020-37256 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2020-37256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37256, 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-2020-37256

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