CVE-2021-39165

Unauthenticated SQL Injection in Cachet

In Cachet versions through 2.3.18, there is a SQL injection which is in the SearchableTrait#scopeSearch(). Attackers without authentication can utilize this vulnerability to exfiltrate sensitive data from the database such as administrator's password and session.

Untrusted input alters a database query, allowing the attacker to read or modify data the query was not intended to access. Typical impact: data disclosure or modification.

CVE-2021-39165 has a CVSS score of 8.1 (High). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. No fixed version is listed yet, so configuration controls and monitoring matter more in the interim.

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The original repository of https://github.com/CachetHQ/Cachet is not active, the stable version 2.3.18 and it's developing 2.4 branch is affected.

Update to version 2.5 or later in the https://github.com/fiveai/Cachet fork to fix this vulnerability.

1. What is CVE-2021-39165? CVE-2021-39165 is a high-severity SQL injection vulnerability in cachethq/cachet (composer), affecting versions <= 2.3.18. No fixed version is listed yet. Untrusted input alters a database query, allowing the attacker to read or modify data the query was not intended to access.
2. How severe is CVE-2021-39165? CVE-2021-39165 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of cachethq/cachet are affected by CVE-2021-39165? cachethq/cachet (composer) versions <= 2.3.18 is affected.
4. Is there a fix for CVE-2021-39165? No fixed version is listed for CVE-2021-39165 yet. Monitor the advisory for updates and apply mitigations in the interim.
5. Is CVE-2021-39165 exploitable, and should I be worried? Whether CVE-2021-39165 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2021-39165 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2021-39165? No fixed version is listed yet. In the interim: Use parameterized queries or prepared statements so user input is always treated as data, never as SQL syntax.

Other vulnerabilities in cachethq/cachet