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movabletype

CVE-2026-24447 is a medium severity vulnerability in Six Apart Ltd. 's Movable Type (Software Edition) affecting versions 8.0.2 to 9.0.5. It involves improper neutralization of formula elements in CSV files generated by the product, allowing maliciously crafted data to embed executable code within CSV exports. When a user downloads and opens such a CSV file in spreadsheet software, the embedded code may execute, potentially compromising the user's environment. The vulnerability requires at least limited privileges to generate the malformed CSV and user interaction to open the file. End-of-life versions 7 and 8.

CVE-2026-24447 is a vulnerability in Six Apart Ltd.'s Movable Type (Software Edition) that arises from improper neutralization of formula elements in CSV files generated by the software. Specifically, when malformed or malicious input data is processed by the affected Movable Type versions (8.0.2 to 9.0.5), the resulting CSV export may contain embedded formula code that spreadsheet applications interpret and execute upon opening. This behavior stems from the fact that spreadsheet software like Microsoft Excel or LibreOffice Calc evaluates formulas starting with characters such as '=', '+', '-', or '@' in CSV cells, which can be exploited to execute arbitrary commands or scripts. The vulnerability affects multiple series, including 8.0, 8.8, and 9.0, and also impacts end-of-life versions 7 and 8.4. The CVSS 3.0 score of 6.5 reflects a medium severity, with an attack vector of network, low attack complexity, requiring privileges and user interaction, and a scope change indicating that the impact extends beyond the vulnerable component. The vulnerability can lead to partial compromise of confidentiality, integrity, and availability of the victim's environment when the CSV file is opened. No public exploits have been reported yet, but the risk remains significant due to the common use of CSV exports and spreadsheet software in enterprise environments. The vulnerability is particularly relevant for organizations that allow users to export data and share CSV files internally or externally, as malicious actors could craft data to trigger code execution on recipients' machines.

Detailed information about CVE-2026-24447: Improper neutralization of formula elements in a CSV file in Six Apart Ltd. Movable Type (Software Edition) affecting

CVE-2026-24447: Improper neutralization of formula elements in a CSV file in Six Apart Ltd. Movable Type (Software Edition) - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-24447: Improper neutralization of formula elements in a CSV file in Six Apart Ltd. Movable Type (Software Edition)

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