CVE-2026-24447 Code injection in Movable Type (Cloud Edition)
Attackers can inject malicious code into CSV exports, leading to code execution when victims open the file in vulnerable Movable Type versions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-24447?
CVE-2026-24447 is a medium-severity code injection vulnerability in Six Apart Ltd. Movable Type (Cloud Edition), published on 4 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
If a malformed data is input to the affected product, a CSV file downloaded from the affected product may contain such malformed data. When a victim user download and open such a CSV file, the embedded code may be executed in the user's environment. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.
Weakness: CWE-1236
Which versions are affected by CVE-2026-24447?
How do I fix CVE-2026-24447?
No fix has been published for CVE-2026-24447 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-24447 being exploited?
There is no known exploitation of CVE-2026-24447 in the wild and no public exploit code.
Sources
Also known as GHSA-2vrw-pcjq-fv9h.