What is CVE-2025-63260?

CVE-2025-63260 is a medium-severity vulnerability in Syncfusion, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-20.

How severe is CVE-2025-63260?

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

XSS in Syncfusion

CVE-2025-63260

SyncFusion 30.1.37 is vulnerable to Cross Site Scripting (XSS) via the Document-Editor reply to comment field and Chat-UI Chat message.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-03-20 · last modified 2026-07-05.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.002 (4.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% 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

Syncfusion — versions 30.1.37

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

syncfusion.com (Product)
pentest-tools.com/PTT-2025-023-Multiple-Stored-XSS.pdf (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-63260?: CVE-2025-63260 is a medium-severity vulnerability in Syncfusion, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-03-20.
How severe is CVE-2025-63260?: Medium severity. CVSS v3 base score is 5.4 out of 10.