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VulnerabilityPublished Updated

CVE-2025-63317: Todoist · Cross-site Scripting

Source CVE Database V5

0

Not known to be exploited · CVSS 5.4 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

To mitigate this vulnerability, European organizations should implement multiple layers of defense: 1) Immediately restrict or disable SVG file uploads in Todoist until a patch is available. 2) If SVG uploads are necessary, apply server-side sanitization to remove any embedded scripts or potentially dangerous elements using robust libraries designed for SVG sanitization. 3) Educate users to be cautious when opening attachments, especially SVG files from untrusted sources or unknown collaborators. 4) Monitor network and application logs for suspicious activity related to file uploads and user interactions with attachments. 5) Employ Content Security Policy (CSP) headers to limit the execution of inline scripts and reduce the impact of XSS attacks. 6) Stay updated with Todoist vendor advisories and apply patches promptly once released. 7) Consider additional endpoint protection and browser security controls to detect and block malicious script execution. 8) Conduct regular security awareness training focusing on phishing and social engineering to reduce the risk of user interaction exploitation.

Description

Todoist v8896 is vulnerable to Cross Site Scripting (XSS) in /api/v1/uploads. Uploaded SVG files have no sanitization applied, so embedded JavaScript executes when a user opens the attachment from a task/comment.

References

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