Vulnerability in Fontforge

CVE-2025-15270

FontForge SFD File Parsing Improper Validation of Array Index Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of SFD files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated array. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-28563.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-15270: held from 0.006 to 0.006.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: -0.000

Affected products

  • Fontforge — versions 2025-11-17, aca4f524c6cb14cdc7bc4cd493492a33f5154797

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-15270?
CVE-2025-15270 is a high-severity vulnerability in Fontforge, classified under Improper Validation of Array Index. CVSS score: 8.8/10. Published 2025-12-31.
How severe is CVE-2025-15270?
High severity. CVSS v3 base score is 8.8 out of 10.