CVE-2021-41749 in the critical feed json
Code Injection in SEOmatic
published 2022-06-12 4 y ago modified 2026-06-17 4 mo ago also GHSA-g7xr-v82w-qggq , EUVD-2022-6049
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 16.8%
- EPSS 16.8% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
In the SEOmatic plugin up to 3.4.11 for Craft CMS 3, it is possible for unauthenticated attackers to perform a Server-Side Template Injection, allowing for remote code execution.
Patch / fix
Exploit prediction
16.79% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template CraftCMS SEOmatic - Server-Side Template Injection nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | nystudio107/craft-seomatic | <3.4.11 |
3.4.11 |
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/nystudio107/craft-seomatic/commit/3fee7d50147cdf3f999cfc1e04cbc3fb3d9f2f7d
web, patch, third-party-advisory
-
github.com
/nystudio107/craft-seomatic/blob/develop/CHANGELOG.md
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-41749
advisory
-
github.com
/nystudio107/craft-seomatic
package
Sources
- CVE List CVE-2021-41749
- GitHub Advisory GHSA-g7xr-v82w-qggq
- NVD CVE-2021-41749
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.