CVE-2020-9757

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because EPSS predicts 94% probability of exploitation within the next 30 days (top 0.1% of all CVEs). NVD baseline CVSS 9.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Elevated
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 73%
CISA-KEV: Not listedEPSS: 73%CVSS: 9.8Exploit: NoneExposed: 0

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

The SEOmatic component before 3.3.0 for Craft CMS allows Server-Side Template Injection that leads to RCE via malformed data to the metacontainers controller.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.4%
KEV
Not listed

Published

March 4, 2020

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Jun 6, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit a1c2cad7e126 (nystudio107/craft-seomatic)

Patch available: nystudio107/craft-seomatic 3.5.14 (contains commit a1c2cad7e126)

https://github.com/nystudio107/craft-seomatic/commit/a1c2cad7e126132d2442ec8ec8e9ab43df02cc0f
github_commit Patch Available

commit 65ab659cb6c9 (nystudio107/craft-seomatic)

Patch available: nystudio107/craft-seomatic 3.5.14 (contains commit 65ab659cb6c9)

https://github.com/nystudio107/craft-seomatic/commit/65ab659cb6c914c7ad671af1e417c0da2431f79b
generic

craft-seomatic/CHANGELOG.md at v3 · nystudio107/craft-seomatic · GitHub

https://github.com/nystudio107/craft-seomatic/blob/v3/CHANGELOG.md
generic

CVE/CVE-2020-9757.txt at master · giany/CVE · GitHub

https://github.com/giany/CVE/blob/master/CVE-2020-9757.txt

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
nystudio107/craft-seomatic3.0.0 ... 3.2.9 (150 versions)3.3.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 26× 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. 2026-07-12 05:44 UTCEPSS rescore
  2. 2026-07-12 05:44 UTCEPSS rescore
  3. 2026-07-09 19:07 UTCEPSS rescore
  4. 2026-07-04 06:29 UTCEPSS rescore
  5. 2026-07-04 06:29 UTCEPSS rescore
  6. 2026-07-02 06:47 UTCOSV refresh
  7. 2026-07-01 15:03 UTCEPSS rescore
  8. 2026-06-30 23:20 UTCEPSS rescore
  9. 2026-06-30 23:20 UTCEPSS rescore
  10. 2026-06-28 14:05 UTCEPSS rescore
  11. 2026-06-28 04:54 UTCEPSS rescore
  12. 2026-06-28 04:54 UTCEPSS rescore
  13. 2026-06-25 13:48 UTCEPSS rescore
  14. 2026-06-25 13:48 UTCEPSS rescore
  15. 2026-06-24 14:03 UTCEPSS rescore
  16. 2026-06-24 14:03 UTCEPSS rescore
  17. 2026-06-23 21:31 UTCEPSS rescore
  18. 2026-06-23 21:31 UTCEPSS rescore
  19. 2026-06-21 14:54 UTCEPSS rescore
  20. 2026-06-21 14:54 UTCEPSS rescore
  21. 2026-06-19 19:24 UTCEPSS rescore
  22. 2026-06-19 19:24 UTCEPSS rescore
  23. 2026-06-17 17:50 UTCEPSS rescore
  24. 2026-06-16 17:50 UTCEPSS rescore
  25. 2026-06-15 17:46 UTCEPSS rescore
Show 7 more
  1. 2026-06-14 07:43 UTCOSV refresh
  2. 2026-05-31 22:29 UTCEPSS rescore
  3. 2026-05-31 22:29 UTCEPSS rescore
  4. 2026-05-27 13:39 UTCEPSS rescore
  5. 2026-05-27 13:39 UTCEPSS rescore
  6. 2026-05-27 07:05 UTCEG score recompute
  7. 2026-05-26 23:13 UTCOSV refresh

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2020/CVE-2020-9757.yaml
    First seen Jan 1, 2020

    Craft CMS < 3.3.0 - Server-Side Template Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-9757?
CVE-2020-9757 is a critical vulnerability published on March 4, 2020. The SEOmatic component before 3.3.0 for Craft CMS allows Server-Side Template Injection that leads to RCE via malformed data to the metacontainers controller.
When was CVE-2020-9757 disclosed?
CVE-2020-9757 was first published in the National Vulnerability Database on March 4, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-9757 actively exploited?
CVE-2020-9757 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-9757?
CVE-2020-9757 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-9757?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-9757, 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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