A Server Side Template Injection (SSTI) was discovered in the SEOmatic plugin before 3.1.4 for Craft CMS, because requests that don't match any elements incorrectly generate the canonicalUrl, and can lead to execution of Twig code.
CVE-2018-14716
Score elevated to 7.6 because EPSS predicts 33% probability of exploitation within the next 30 days (top 1.8% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.6(high)
- EG Risk
- 55(Track)EG Risk 55/100SSVC: 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 computedSeverity76% × 45%Exploitation40% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 98.2%
- KEV
- Not listed
Published
August 6, 2018
Last Modified
November 21, 2024
References (12)
- cve@mitrehttp://ha.cker.info/exploitation-of-server-side-template-injection-with-craft-cms-plguin-seomatic/
- cve@mitrehttps://github.com/nystudio107/craft-seomatic/commit/1e7d1d084ac3a89e7ec70620f2749110508d1ce1
- cve@mitrehttps://github.com/nystudio107/craft-seomatic/releases/tag/3.1.4
- cve@mitrehttps://twitter.com/nystudio107/status/1021847835418009605
- cve@mitrehttps://twitter.com/nystudio107/status/1021855169515057152
- cve@mitrehttps://www.exploit-db.com/exploits/45108/
- af854a3a-2127-422b-91ae-364da2661108http://ha.cker.info/exploitation-of-server-side-template-injection-with-craft-cms-plguin-seomatic/
- af854a3a-2127-422b-91ae-364da2661108https://github.com/nystudio107/craft-seomatic/commit/1e7d1d084ac3a89e7ec70620f2749110508d1ce1
- af854a3a-2127-422b-91ae-364da2661108https://github.com/nystudio107/craft-seomatic/releases/tag/3.1.4
- af854a3a-2127-422b-91ae-364da2661108https://twitter.com/nystudio107/status/1021847835418009605
- af854a3a-2127-422b-91ae-364da2661108https://twitter.com/nystudio107/status/1021855169515057152
- af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/45108/
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nystudio107/craft-seomatic | 3.0.0 ... 3.1.3 (52 versions) | 3.1.4 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 12× in last 7d / 38× 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.
- 2026-07-23 01:33 UTCEG score recompute▲ 0.10
- 2026-07-22 22:13 UTCEG score recompute
- 2026-07-22 14:04 UTCEPSS rescore
- 2026-07-21 15:21 UTCEPSS rescore
- 2026-07-21 07:18 UTCOSV refresh
- 2026-07-20 17:04 UTCEPSS rescore
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- 2026-07-06 02:20 UTCEPSS rescore
- 2026-07-04 06:28 UTCEPSS rescore
- 2026-07-04 02:56 UTCOSV refresh
- 2026-07-02 16:54 UTCEPSS rescore
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- 2026-07-01 15:03 UTCEPSS rescore
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- 2026-06-15 14:43 UTCOSV refresh
- 2026-06-14 23:14 UTCEPSS rescore
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- 2026-06-02 20:11 UTCEPSS rescore
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- 2026-06-01 13:49 UTCEPSS rescore
- 2026-05-31 00:14 UTCEPSS rescore
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- 2026-05-29 13:41 UTCEPSS rescore
- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-28 04:13 UTCEG score recompute
- 2026-05-27 13:38 UTCEPSS rescore
- 2026-05-27 13:38 UTCEPSS rescore
Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Exploit-DBEDB-45108First seen Jul 31, 2018
Craft CMS SEOmatic plugin 3.1.4 - Server-Side Template Injection
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-94
Frequently asked(5)
What is CVE-2018-14716?
When was CVE-2018-14716 disclosed?
Is CVE-2018-14716 actively exploited?
What is the CVSS score of CVE-2018-14716?
How do I remediate CVE-2018-14716?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-14716
Is Your Infrastructure Affected by CVE-2018-14716?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.