Server-side Template Injection (SSTI) vulnerability in Winter CMS v.1.2.3 allows a remote attacker to execute arbitrary code via a crafted payload to the CMS Pages field and Plugin components. NOTE: the vendor disputes this because the payload could only be entered by a trusted user, such as the owner of the server that hosts Winter CMS, or a developer working for them.
CVE-2024-29686
Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2024-03-29. NVD baseline CVSS 7.2; sources differ by 1.6.
- 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
- 7.2
- EG Score
- 8.8(medium)
- EPSS
- 76.2%
- KEV
- Not listed
Published
March 29, 2024
Last Modified
May 28, 2025
References (6)
- cve@mitrehttps://forum.ksec.co.uk/t/webapps-winter-cms-1-2-3-server-side-template-injection-ssti-authenticated/2779
- cve@mitrehttps://wintercms.com/docs/v1.2/docs/cms/themes#template-structure
- cve@mitrehttps://www.exploit-db.com/exploits/51893
- af854a3a-2127-422b-91ae-364da2661108https://forum.ksec.co.uk/t/webapps-winter-cms-1-2-3-server-side-template-injection-ssti-authenticated/2779
- af854a3a-2127-422b-91ae-364da2661108https://wintercms.com/docs/v1.2/docs/cms/themes#template-structure
- af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/51893
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| composer | wintercms/winter | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| wintercms/winter | v1.0.319 ... v1.2.3 (172 versions) | — | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 50× 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.
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- 2026-05-24 05:36 UTCEG score recompute
- 2026-05-24 05:36 UTCGHSA enrichment
Frequently asked(5)
What is CVE-2024-29686?
When was CVE-2024-29686 disclosed?
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Dependency Blast Radius
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