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VulnerabilityPublished Updated

CVE-2024-29686: winter · Server-side Template Injection (SSTI)

Affects winterSource CVE Database V5

0

Not known to be exploited · CVSS 7.2 High.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
7.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.8% chance of exploitation in 30 days – higher than 78% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Mar 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Packagistwintercms/winterpkg:composer/wintercms/winterOther threatsAffected
  • =1.2.3
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Organizations should immediately review and restrict access to trusted user accounts that can modify CMS Pages and Plugin components, ensuring only necessary personnel have such privileges. Implement strict input validation and sanitization for template fields to prevent injection of malicious payloads. Monitor logs and audit trails for unusual template modifications or suspicious activity by trusted users. Employ application-level security controls such as Web Application Firewalls (WAFs) configured to detect and block SSTI patterns. Engage with Winter CMS vendor channels for updates and apply patches promptly once released. Additionally, conduct security awareness training for developers and administrators about the risks of template injection and secure coding practices.

Description

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.

References

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