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Fencer Intel
medium 5.4

CVE-2020-12259 json

rConfig 3.9.4 is vulnerable to reflected XSS.

published 6y ago modified 4mo ago also EUVD-2020-4573

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
96.4%
EPSS 96.4% chance of exploitation in 30 days, percentile 99.8%
public exploits
0
none known, plus a Nuclei check

Summary

rConfig 3.9.4 is vulnerable to reflected XSS. The configDevice.php file improperly validates user input. An attacker can exploit this vulnerability by crafting arbitrary JavaScript in the rid GET parameter of devicemgmnt.php.

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Exploit prediction

96.35% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

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
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

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

References

Sources

Fencer Intel 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.