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Fencer Vulns
medium 5.4

CVE-2023-44276 json

OPNsense before 23.7.5 allows XSS via the index.php sequence parameter to the Lobby Dashboard.

published 2023-09-28 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-48632

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

OPNsense before 23.7.5 allows XSS via the index.php sequence parameter to the Lobby Dashboard.

Patch / fix

  • opnsense opnsense 23.7.5

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • x41-dsec.de https://www.x41-dsec.de/lab/advisories/x41-2023-001-opnsense referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.