CVE-2023-28835

Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker willing to brute force it. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. This issue only affects users who do not have a password policy enabled, so enabling a password policy is an effective mitigation for users unable to upgrade.
PRNG
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
3.5 LOW
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
GitHub_MCNA
3.5 LOW
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CVEADP
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CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 71%
VendorProductVersion
nextcloudnextcloud_server
23.0.0 ≤
𝑥
< 23.0.14
nextcloudnextcloud_server
24.0.0 ≤
𝑥
< 24.0.10
nextcloudnextcloud_server
24.0.0 ≤
𝑥
< 24.0.10
nextcloudnextcloud_server
25.0.0 ≤
𝑥
< 25.0.4
nextcloudnextcloud_server
25.0.0 ≤
𝑥
< 25.0.4
𝑥
= Vulnerable software versions