CVE-2021-39195: high-severity vulnerability in misskey-dev misskey
Server-Side Request Forgery vulnerability in misskey
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.7epss 1.1%
Misskey is an open source, decentralized microblogging platform. In affected versions a Server-Side Request Forgery vulnerability exists in "Upload from URL" and remote attachment handling. This could result in the disclosure of non-public information within the internal network. This has been fixed in 12.90.0. However, if you are using a proxy, you will need to take additional measures. As a workaround this exploit may be avoided by appropriately restricting access to private networks from the host where the application is running.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Affected products
misskey-dev · misskeyRelated CVEs — misskey-dev misskey
In the same product, most dangerous first.
CVE-2023-43793HIGHMisskey allows users to bypass authentication of Bull dashboardEPSS 0.8%CVE-2021-39169HIGHXSS vulnerability using dialogEPSS 0.7%CVE-2023-24812HIGHSQL injection of notes/search-by-tagEPSS 0.7%CVE-2024-25636HIGHLack of media type verification of Activity Streams objects allows impersonation and takeover of remote accountsEPSS 0.7%CVE-2026-104816HIGHMisskey: Cross-site scripting in RSS feed item linksEPSS 0.6%CVE-2026-57575MEDIUMMisskey: SSRF bypass in URL PreviewEPSS 0.6%