CVE-2025-66633 is a medium severity vulnerability classified under CWE-125 (Out-of-bounds Read) affecting Canva Affinity version 3.0.1.3808. The flaw exists in the Enhanced Metafile (EMF) file processing component, where the application fails to properly validate input data boundaries. By opening a specially crafted EMF file, an attacker can trigger the application to read memory outside the allocated buffer. This out-of-bounds read can expose sensitive information residing in adjacent memory areas, potentially leaking confidential data such as user credentials, cryptographic keys, or other private information stored in memory. The vulnerability requires the victim to open a malicious EMF file, implying user interaction is necessary. The attack vector is local (AV:L), meaning the attacker must have access to the victim system to deliver the malicious file. No privileges are required (PR:N), and the attack complexity is low (AC:L). The vulnerability does not affect the integrity or availability of the system but compromises confidentiality. Currently, no public exploits or patches are available, so organizations should monitor for updates. The vulnerability highlights the risks associated with processing complex file formats like EMF without rigorous input validation and memory safety checks.

The primary impact of CVE-2025-66633 is the potential unauthorized disclosure of sensitive information from the memory of systems running Canva Affinity 3.0.1.3808. This can lead to leakage of confidential data, which may include personal user information, authentication tokens, or other sensitive application data. Although the vulnerability does not allow code execution or system compromise, the exposure of sensitive information can facilitate further attacks such as credential theft or targeted phishing. The requirement for local access and user interaction limits the scope of exploitation, reducing the risk of widespread remote attacks. However, organizations that handle sensitive design files or use Canva Affinity in environments with high confidentiality requirements may face increased risk. The lack of available patches means the vulnerability remains exploitable until fixed, necessitating cautious handling of EMF files. Overall, the impact is moderate but significant for environments where data confidentiality is critical.

To mitigate CVE-2025-66633, organizations should implement the following specific measures: 1) Avoid opening EMF files from untrusted or unknown sources within Canva Affinity until a patch is released. 2) Employ application whitelisting and restrict user permissions to minimize the risk of opening malicious files. 3) Use endpoint protection solutions capable of detecting suspicious file behaviors or malformed EMF files. 4) Monitor network and endpoint logs for unusual activity related to file handling or memory access anomalies. 5) Educate users about the risks of opening unsolicited or unexpected EMF files and encourage verification of file sources. 6) Regularly check for and apply vendor updates or patches as soon as they become available. 7) Consider isolating systems running Canva Affinity from high-risk networks or limiting their exposure to external file transfers. These targeted actions go beyond generic advice by focusing on the specific file format and application involved.