CVE-2025-62403 is classified as a CWE-125 out-of-bounds read vulnerability affecting the EMF (Enhanced Metafile) functionality in Canva Affinity version 3.0.1.3808. The flaw arises when the application processes specially crafted EMF files, which are a vector graphics format used primarily on Windows platforms. By exploiting this vulnerability, an attacker can cause the software to read memory outside the allocated buffer boundaries, potentially leaking sensitive data stored in memory. This vulnerability does not allow direct code execution or modification of data but compromises confidentiality by exposing potentially sensitive information. The attack vector requires local access (AV:L) and user interaction (UI:R), meaning the victim must open a malicious EMF file, typically delivered via phishing or social engineering. The vulnerability has a CVSS v3.1 base score of 6.1, indicating medium severity, with high confidentiality impact but no impact on integrity and low impact on availability. No patches are currently available, and no exploits have been observed in the wild, but the vulnerability is publicly disclosed and documented. The issue is particularly relevant for organizations relying on Canva Affinity for graphic design, especially those handling sensitive or proprietary visual content. The vulnerability highlights the risk of processing untrusted EMF files, a known attack surface in Windows-based graphical applications.

The primary impact of CVE-2025-62403 is the potential unauthorized disclosure of sensitive information from the memory space of Canva Affinity. This could include fragments of documents, credentials, or other confidential data temporarily held in memory during file processing. While the vulnerability does not allow code execution or system compromise, the leakage of sensitive data can lead to privacy violations, intellectual property theft, or aid in further targeted attacks. Organizations in creative industries, marketing, and media that use Canva Affinity extensively may face risks of data leakage if attackers can trick users into opening malicious EMF files. The requirement for local access and user interaction limits the scope of exploitation but does not eliminate risk, especially in environments where users frequently exchange graphic files. The absence of known exploits in the wild reduces immediate threat but the public disclosure increases the likelihood of future exploitation attempts. Overall, the vulnerability poses a moderate risk to confidentiality and could undermine trust in affected applications if exploited.

To mitigate CVE-2025-62403, organizations should implement the following specific measures: 1) Restrict the opening of EMF files from untrusted or unknown sources within Canva Affinity, educating users about the risks of opening unsolicited graphic files. 2) Employ application whitelisting and sandboxing techniques to isolate Canva Affinity processes, limiting the impact of any memory disclosure. 3) Monitor and control file exchange channels (email, file sharing platforms) to detect and block suspicious EMF files using advanced file inspection tools. 4) Maintain strict endpoint security policies that limit local access privileges and enforce least privilege principles to reduce attack surface. 5) Stay vigilant for official patches or updates from Canva and apply them promptly once available. 6) Consider disabling EMF file support in Canva Affinity if not required for business operations, or use alternative file formats less prone to such vulnerabilities. 7) Implement memory protection mechanisms and runtime application self-protection (RASP) where feasible to detect anomalous memory access patterns. These targeted steps go beyond generic advice by focusing on controlling the specific attack vector and limiting exposure.