diff --git a/SECURITY.md b/SECURITY.md
index 2eba0a1b..4b190778 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -1,13 +1,13 @@
-# Security Policy
+# Security policy
 
-## Supported Versions
+## Supported versions
 
 | Version | Supported          |
 | ------- | ------------------ |
 | 2.4.x   | :white_check_mark: |
 | <2.4.x   | :x:                |
 
-## Reporting a Vulnerability
+## Reporting a vulnerability
 
 Please report any security issues via email to security@getontracks.org.
 If you don't get a reply for your email, resend the email after one week.
@@ -19,3 +19,45 @@ You can (and should) encrypt the email you send with OpenGPG key
 
 Unfortunately Tracks is not part of a bug bounty program, but we do provide
 appropriate credits for disclosing security issues.
+
+## Evaluating and fixing a vulnerability
+
+When a security vulnerability is reported to the maintainers, the
+maintainers first validate the vulnerability and preliminarily estimate
+the risk caused by the vulnerability.
+
+Any security issue is kept strictly confidential until a fix is made and
+validated by the maintainers and, if necessary, the reporter. Any fixes
+are not committed to the public repository before publishing.
+
+When a fix has been validated, the final risk assessment of the issue is
+done based on the latest version of the CVSS system and the criteria below.
+
+## Security advisories
+
+A security advisory is a public announcement managed by the maintainers
+which informs instance maintainers about a security problem in the software
+and the steps instance maintainers should take to address it. On release it
+is published widely so that instance maintainers can address it quickly.
+
+If necessary, the maintainers can decide to issue a pre-announcement
+informing the instance maintainers of an upcoming security advisory. This
+is done when timely addressing of the vulnerability is very important due
+to the high risk caused by it.
+
+Security advisories are published for security vulnerabilities that
+
+* Are caused by code included in the software repository (not any libraries
+  or other code not itself in the repository),
+* Exist in stable or release candidate releases (not alpha or beta
+  releases or unreleased code),
+* Are exploitable either without logging in or without admin privileges, and
+* Affect either the whole instance or other users than the one running the
+  exploit.
+
+## Other vulnerabilities
+
+If the vulnerability does not warrant a security advisory, the vulnerability
+is fixed and released with a note in the release notes of the release.
+Details of the vulnerability as well as the risk assessment and grounds for
+not publishing a security advisory are included.