CVSS v3
7.5
HIGH
EPSS Score
24.0%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.)
In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.)
Active exploitation of CVE-2021-40524 has not been confirmed. The EPSS score is 24.0%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2021-40524 has a CVSS v3 base score of 7.5 (HIGH severity).
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Ranked by exploit probability (EPSS).