What is CVE-2025-63317?

CVE-2025-63317 is a medium-severity vulnerability in Doist Todoist, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-01.

How severe is CVE-2025-63317?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Doist Todoist

CVE-2025-63317

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-12-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.5th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Doist Todoist — versions 8486

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/sefabasnak/Todoistv8896 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-63317?: CVE-2025-63317 is a medium-severity vulnerability in Doist Todoist, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-01.
How severe is CVE-2025-63317?: Medium severity. CVSS v3 base score is 5.4 out of 10.