How severe is CVE-2020-12259?

CVE-2020-12259 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-12259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 95% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12259?

CVE-2020-12259 affects Rconfig. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12259?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-12259 published?

CVE-2020-12259 was published on 2020-05-18 and last updated on 2026-06-17.

CVE-2020-12259

CVE-2020-12259 is a medium-severity vulnerability in Rconfig with a CVSS 3.x base score of 5.4. Its EPSS exploit-prediction score of 95% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 95% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Rconfig
Published: 2020-05-18
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-12259?: 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.
How severe is CVE-2020-12259?: CVE-2020-12259 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-12259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 95% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12259?: CVE-2020-12259 affects Rconfig. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12259 published?: CVE-2020-12259 was published on 2020-05-18 and last updated on 2026-06-17.

References

https://gist.github.com/farid007/8855031bad0e497264e4879efb5bc9f8

Affected products (1)

cpe:2.3:a:rconfig:rconfig:3.9.4:*:*:*:*:*:*:*

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