How severe is CVE-2020-9545?

CVE-2020-9545 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-9545 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9545?

CVE-2020-9545 affects Palemoon Pale Moon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9545?

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-2020-9545 published?

CVE-2020-9545 was published on 2020-03-02 and last updated on 2026-06-17.

CVE-2020-9545

CVE-2020-9545 is a high-severity vulnerability in Palemoon Pale Moon with a CVSS 3.x base score of 7.5. 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Palemoon Pale Moon
Published: 2020-03-02
Last modified: 2026-06-17

Description

Pale Moon 28.x before 28.8.4 has a segmentation fault related to module scripting, as demonstrated by a Lacoste web site.

Frequently asked questions

What is CVE-2020-9545?: Pale Moon 28.x before 28.8.4 has a segmentation fault related to module scripting, as demonstrated by a Lacoste web site.
How severe is CVE-2020-9545?: CVE-2020-9545 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-9545 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9545?: CVE-2020-9545 affects Palemoon Pale Moon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9545?: 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-2020-9545 published?: CVE-2020-9545 was published on 2020-03-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:palemoon:pale_moon:*:*:*:*:*:*:*:*

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