What is CVE-2025-48051?

CVE-2025-48051 is a medium-severity vulnerability in Lichess Lila, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2025-05-15.

How severe is CVE-2025-48051?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Is CVE-2025-48051 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Lichess Lila

CVE-2025-48051

powertip.ts in Lila (for Lichess) before ab0beaf allows XSS in some applications because of an innerHTML usage pattern in which text is extracted from a DOM node and interpreted as HTML.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (27.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Lichess Lila — versions 0
Lichess Powertip.ts

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

cve@mitre.org (Exploit, Vendor Advisory)
cve@mitre.org (Patch)
cve@mitre.org (Product)

Frequently asked questions

What is CVE-2025-48051?: CVE-2025-48051 is a medium-severity vulnerability in Lichess Lila, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2025-05-15.
How severe is CVE-2025-48051?: Medium severity. CVSS v3 base score is 4.7 out of 10.
Is CVE-2025-48051 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.