CVE-2020-12790
SEOmatic for CraftCMS allows Server-Side Template Injection
In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.
- Record
CVE-2020-12790- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
CVE List No score
In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.
- Record
CVE-2020-12790- Updated
- 2026-11-02
EUVDEUVD-2022-1894 No score
In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.
- Record
EUVD-2022-1894- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-23q7-59jj-2pj4
SEOmatic for CraftCMS allows Server-Side Template Injection
In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.
- Record
GHSA-23q7-59jj-2pj4- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
OSV
In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.
- Record
CVE-2020-12790- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-23q7-59jj-2pj4
SEOmatic for CraftCMS allows Server-Side Template Injection
In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.
- Record
GHSA-23q7-59jj-2pj4- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nystudio107/craft-seomaticPackagist |
before 3.2.49 | 3.2.49 |
nystudio107/craft-seomaticPackagist |
before 3.2.49, plus listed versions 3.0.03.0.0-beta.13.0.0-beta.103.0.0-beta.113.0.0-beta.12 Show 45 moreShow less3.0.0-beta.133.0.0-beta.143.0.0-beta.153.0.0-beta.163.0.0-beta.173.0.0-beta.183.0.0-beta.193.0.0-beta.23.0.0-beta.203.0.0-beta.213.0.0-beta.223.0.0-beta.233.0.0-beta.243.0.0-beta.33.0.0-beta.43.0.0-beta.53.0.0-beta.63.0.0-beta.73.0.0-beta.83.0.0-beta.93.0.13.0.103.0.113.0.123.0.133.0.143.0.153.0.163.0.173.0.183.0.23.0.203.0.223.0.233.0.243.0.253.0.33.0.43.0.53.0.63.0.73.0.83.0.93.1.03.1.1 |
3.2.49 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-12790 is a high vulnerability (CVSS 7.5) in Nystudio107 Seomatic, published May 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.19%, the 82nd percentile. Fixed in nystudio107/craft-seomatic 3.2.49.
References
github.com/nystudio107/craft-seomatic/releases/tag/3.2.49
isec.pl/en/vulnerabilities/isec-0028-seomatic-ssti-23032020.txt
nvd.nist.gov/vuln/detail/CVE-2020-12790
Left out here: 97 versions. The JSON record has them.