CVE-2020-9545: palemoon pale_moon NULL Pointer Dereference
Vulnerability summary
CVE-2020-9545 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in palemoon pale_moon. EPSS estimates a 1.35% chance of exploitation in the next 30 days, higher than 71.4% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Timeline
- 02-03-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Pale Moon 28.x before 28.8.4 has a segmentation fault related to module scripting, as demonstrated by a Lacoste web site.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.35%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.35% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Palemoon1 product
- pale_moon≥ 28.0, < 28.8.4
1 vendor · 1 product