Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2025-66034

fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9abe4c3de271b1c794ee542922fa20106f94a6749fa28138119825c3353faadd
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"fonttools","vendor":"fonttools","versions":[{"status":"affected","version":">= 4.33.0, < 4.60.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:65bf006640c80a0a381a031d81bc57ee8126790101d09d6ef246d3dd1aca637c · sha256:e2ae4207b959cbac… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":6.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:65bf006640c80a0a381a031d81bc57ee8126790101d09d6ef246d3dd1aca637c · sha256:e2ae4207b959cbac… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-91","description":"CWE-91: XML Injection (aka Blind XPath Injection)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:65bf006640c80a0a381a031d81bc57ee8126790101d09d6ef246d3dd1aca637c · sha256:e2ae4207b959cbac… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/fonttools/fonttools/commit/a696d5ba93270d5954f98e7cab5ddca8a02c1e32","tags":["x_refsource_MISC"],"url":"https://github.com/fonttools/fonttools/commit/a696d5ba93270d5954f98e7cab5ddca8a02c1e32"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:65bf006640c80a0a381a031d81bc57ee8126790101d09d6ef246d3dd1aca637c · sha256:e2ae4207b959cbac… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/fonttools/fonttools/security/advisories/GHSA-768j-98cg-p3fv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:65bf006640c80a0a381a031d81bc57ee8126790101d09d6ef246d3dd1aca637c · sha256:e2ae4207b959cbac… · /containers/adp/0/references/0
{"name":"https://github.com/fonttools/fonttools/security/advisories/GHSA-768j-98cg-p3fv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/fonttools/fonttools/security/advisories/GHSA-768j-98cg-p3fv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:65bf006640c80a0a381a031d81bc57ee8126790101d09d6ef246d3dd1aca637c · sha256:e2ae4207b959cbac… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer