CVE-2021-39173
CVSS v3
8.8
HIGH
EPSS Score
2.4 %
exploit probability, as of 2026-10-20
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- cachethq/cachetPackagistall versions · fixed in 2.5.1
Description
Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.
Technical details
- Published
- 2021-08-27
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.