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CVE-2020-12790

20
FAUCET Score

CVE-2020-12790 describes a Server-Side Template Injection vulnerability in the SEOmatic plugin for Craft CMS, specifically affecting versions prior to 3.2.49. An attacker can exploit improper URL sanitization in helpers/DynamicMeta.php to inject crafted Twig templates, leading to the disclosure of sensitive credentials. This vulnerability carries a CVSS score of 7.5 (High), indicating a network-exploitable flaw with low attack complexity and high impact on confidentiality. While no active exploitation, public exploit code, or significant community discussion has been observed, organizations using affected versions should prioritize patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2.49CPE matchmatch criteria
cpe:2.3:a:nystudio107:seomatic:*:*:*:*:*:craft_cms:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.19%
Probability of exploitation in next 30 days
EPSS Percentile
80.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0219 is in the 65th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: nystudio107/craft-seomaticFixed in: 3.2.49
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-23q7-59jj-2pj4high

SEOmatic for CraftCMS allows Server-Side Template Injection

May 24, 2022

References

github.com / nystudio107/craft-seomatic/blob/v3/CHANGELOG.md
Release NotesThird Party Advisory
github.com / nystudio107/craft-seomatic/commit/82f4a25b28fd622393da6592dc9e5ccee7fc5be3
PatchThird Party Advisory
github.com / nystudio107/craft-seomatic/releases/tag/3.2.49
Release NotesThird Party Advisory
isec.pl / en/vulnerabilities/isec-0028-seomatic-ssti-23032020.txt
ExploitThird Party Advisory