How severe is CVE-2020-25690?

CVE-2020-25690 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-25690 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25690?

CVE-2020-25690 affects Fontforge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25690?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-25690 published?

CVE-2020-25690 was published on 2021-02-23 and last updated on 2026-06-17.

CVE-2020-25690

CVE-2020-25690 is a high-severity vulnerability in Fontforge with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Fontforge
Published: 2021-02-23
Last modified: 2026-06-17

Description

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Frequently asked questions

What is CVE-2020-25690?: An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
How severe is CVE-2020-25690?: CVE-2020-25690 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-25690 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25690?: CVE-2020-25690 affects Fontforge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25690?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-25690 published?: CVE-2020-25690 was published on 2021-02-23 and last updated on 2026-06-17.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1893188

Affected products (1)

cpe:2.3:a:fontforge:fontforge:*:*:*:*:*:*:*:*

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