MEDIUM

CVE-2020-12256

CVSS v3

5.4

MEDIUM

EPSS Score

95.8 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2020-12256 yet.

Full record on NVD

Description

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

Technical details

Published: 2020-05-18

Frequently asked questions

What is CVE-2020-12256?

Is CVE-2020-12256 actively exploited?

Active exploitation of CVE-2020-12256 has not been confirmed. Its EPSS score was 95.8% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-12256?

CVE-2020-12256 has a CVSS v3 base score of 5.4 (MEDIUM severity).

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