CVE-2020-9757

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 73% (99th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 73%
CISA-KEV: Not listedEPSS PROB: 73%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALmedium confidence
EG Risk
78
EG Risk 78/100CISA SSVC

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
Severity98% × 45%
Exploitation73% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
73%
EPSS %ILE
99th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

March 4, 2020

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Oct 4, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit a1c2cad7e126 (nystudio107/craft-seomatic)

Patch available: nystudio107/craft-seomatic 3.5.15 (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 3.5.15 (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 rangeFix by version rangeDependents
nystudio107/craft-seomatic3.0.0 ... 3.2.9 (150 versions)
  • every version up to 3.3.0: fixed in 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 / 20× 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. 2026-10-10 19:56 UTCEPSS rescore
  2. 2026-10-07 23:44 UTCEPSS rescore
  3. 2026-10-06 15:13 UTCEPSS rescore
  4. 2026-10-03 14:22 UTCEPSS rescore
  5. 2026-10-03 14:22 UTCEPSS rescore
  6. 2026-10-01 19:46 UTCEPSS rescore
  7. 2026-09-30 15:26 UTCEG score recompute
  8. 2026-09-30 14:59 UTCEPSS rescore
  9. 2026-09-27 08:32 UTCOSV refresh
  10. 2026-09-26 15:54 UTCEPSS rescore
  11. 2026-09-26 15:54 UTCEPSS rescore
  12. 2026-09-26 00:21 UTCEPSS rescore
  13. 2026-09-24 14:00 UTCEPSS rescore
  14. 2026-09-22 14:44 UTCEPSS rescore
  15. 2026-09-21 20:28 UTCEPSS rescore
  16. 2026-09-18 19:23 UTCEPSS rescore
  17. 2026-09-17 19:22 UTCEPSS rescore
  18. 2026-09-16 14:04 UTCEPSS rescore
  19. 2026-09-15 03:06 UTCEPSS rescore
  20. 2026-09-12 14:57 UTCEPSS rescore
  21. 2026-09-07 17:51 UTCOSV refresh
  22. 2026-09-06 13:44 UTCEPSS rescore
  23. 2026-09-05 15:25 UTCEPSS rescore
  24. 2026-09-04 13:57 UTCEPSS rescore
  25. 2026-09-04 13:57 UTCEPSS rescore
Show 68 more
  1. 2026-09-02 14:08 UTCEPSS rescore
  2. 2026-08-30 19:14 UTCEPSS rescore
  3. 2026-08-30 01:19 UTCEPSS rescore
  4. 2026-08-28 21:37 UTCEPSS rescore
  5. 2026-08-26 14:42 UTCEPSS rescore
  6. 2026-08-21 23:45 UTCEPSS rescore
  7. 2026-08-21 03:23 UTCOSV refresh
  8. 2026-08-19 17:00 UTCEPSS rescore
  9. 2026-08-18 13:44 UTCEPSS rescore
  10. 2026-08-16 02:11 UTCEPSS rescore
  11. 2026-08-15 01:27 UTCEPSS rescore
  12. 2026-08-13 21:57 UTCEPSS rescore
  13. 2026-08-12 13:47 UTCEPSS rescore
  14. 2026-08-08 16:33 UTCEPSS rescore
  15. 2026-08-07 16:23 UTCEPSS rescore
  16. 2026-08-05 19:14 UTCEPSS rescore
  17. 2026-08-05 18:41 UTCOSV refresh
  18. 2026-08-02 02:24 UTCEPSS rescore
  19. 2026-07-30 16:25 UTCEPSS rescore
  20. 2026-07-28 15:33 UTCEPSS rescore
  21. 2026-07-26 14:52 UTCEPSS rescore
  22. 2026-07-25 14:15 UTCEPSS rescore
  23. 2026-07-24 14:15 UTCEPSS rescore
  24. 2026-07-23 01:55 UTCEG score recompute
  25. 2026-07-22 22:42 UTCEG score recompute
  26. 2026-07-22 14:05 UTCEPSS rescore
  27. 2026-07-21 15:22 UTCEPSS rescore
  28. 2026-07-21 15:22 UTCEPSS rescore
  29. 2026-07-20 17:04 UTCEPSS rescore
  30. 2026-07-20 17:04 UTCEPSS rescore
  31. 2026-07-19 17:48 UTCOSV refresh
  32. 2026-07-15 16:55 UTCEPSS rescore
  33. 2026-07-15 16:55 UTCEPSS rescore
  34. 2026-07-15 01:57 UTCEPSS rescore
  35. 2026-07-13 06:10 UTCEPSS rescore
  36. 2026-07-13 06:10 UTCEPSS rescore
  37. 2026-07-12 05:44 UTCEPSS rescore
  38. 2026-07-12 05:44 UTCEPSS rescore
  39. 2026-07-09 19:07 UTCEPSS rescore
  40. 2026-07-04 06:29 UTCEPSS rescore
  41. 2026-07-04 06:29 UTCEPSS rescore
  42. 2026-07-02 06:47 UTCOSV refresh
  43. 2026-07-01 15:03 UTCEPSS rescore
  44. 2026-06-30 23:20 UTCEPSS rescore
  45. 2026-06-30 23:20 UTCEPSS rescore
  46. 2026-06-28 14:05 UTCEPSS rescore
  47. 2026-06-28 04:54 UTCEPSS rescore
  48. 2026-06-28 04:54 UTCEPSS rescore
  49. 2026-06-25 13:48 UTCEPSS rescore
  50. 2026-06-25 13:48 UTCEPSS rescore
  51. 2026-06-24 14:03 UTCEPSS rescore
  52. 2026-06-24 14:03 UTCEPSS rescore
  53. 2026-06-23 21:31 UTCEPSS rescore
  54. 2026-06-23 21:31 UTCEPSS rescore
  55. 2026-06-21 14:54 UTCEPSS rescore
  56. 2026-06-21 14:54 UTCEPSS rescore
  57. 2026-06-19 19:24 UTCEPSS rescore
  58. 2026-06-19 19:24 UTCEPSS rescore
  59. 2026-06-17 17:50 UTCEPSS rescore
  60. 2026-06-16 17:50 UTCEPSS rescore
  61. 2026-06-15 17:46 UTCEPSS rescore
  62. 2026-06-14 07:43 UTCOSV refresh
  63. 2026-05-31 22:29 UTCEPSS rescore
  64. 2026-05-31 22:29 UTCEPSS rescore
  65. 2026-05-27 13:39 UTCEPSS rescore
  66. 2026-05-27 13:39 UTCEPSS rescore
  67. 2026-05-27 07:05 UTCEG score recompute
  68. 2026-05-26 23:13 UTCOSV refresh

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2020/CVE-2020-9757.yaml
    Published Jul 3, 2020

    Craft CMS < 3.3.0 - Server-Side Template Injection

    Open source ↗

Related CVEs(same product + 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 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 73% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2020-9757 is available: update to the fixed version the vendor names in its advisory.

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