Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
CI4MS (ci4-cms-erp/ci4ms) versions before 0.31.4.0 are vulnerable to CRLF injection through the unvalidated `host` POST parameter of the install controller, which is written into the .env file without newline filtering. An unauthenticated attacker can reach the install endpoint during a fresh deployment or after the settings cache expires, and can inject arbitrary configuration lines such as a different application base URL or altered security settings. Upgrade to version 0.31.4.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.1 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0053, the 45th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:25 UTC First seen by agentprime
- 31 Oct 2026, 14:25 UTC Confirmed by OSV