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Fencer Vulns
critical 9.8

CVE-2023-31465 in the critical feed json

An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28.

published 2023-07-26 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35771

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
46.3%
EPSS 46.3% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known, plus a Nuclei check

Summary

An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28. By intercepting requests from various timekeeper streams, it is possible to find the getsamplebacklog call. Some query parameters are passed directly in the URL and named arg[x], with x an integer starting from 1; it is possible to modify arg[2] to insert Bash code that will be executed directly by the server.

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

46.30% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template TimeKeeper by FSMLabs - Remote Code Execution nuclei detection template
  • github.com https://github.com/CapgeminiCisRedTeam/Disclosure/blob/main/CVE%20PoC/CVE-2023-31465.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.