9.3

CVE-2025-64486: kovidgoyal calibre External Control of File Name or Path

CVSS: 9.3v4.0CriticalDeferred
AliasesUBUNTU-CVE-2025-64486DEBIAN-CVE-2025-64486
Published 07-11-2025Last modified 13-11-2025
Open JSON

Vulnerability summary

CVE-2025-64486 is a critical (CVSS 9.3) External Control of File Name or Path vulnerability in kovidgoyal calibre. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-11-2025
    PublishedVulnerability first disclosed.
  2. 13-11-2025
    Last modifiedVulnerability information updated.

Description

calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution. This issue is fixed in version 8.14.0.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.01 pp

From 0.18% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • calibre< 6.13.0+repack-2+deb12u5 | < 8.5.0+ds-1+deb13u1 | < 8.14.0+ds+~0.10.5-1
Kovidgoyal1 product
Ubuntu1 product
  • calibreAll versions (No fix recorded)

3 vendors · 3 products

References

5 links