CVE-2020-12258

Name: CVE-2020-12258
Creator: NVD / NIST
Published: 2020-05-18T14:15:11.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.71%

Last modified Jun 17, 2026

CVE-2020-12258 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. rConfig 3.9.4 is vulnerable to session fixation because session expiry and randomization are mishandled. The application can reuse a session via PHPSESSID. EPSS estimates a 1.71% chance of exploitation in the next 30 days.

Description

rConfig 3.9.4 is vulnerable to session fixation because session expiry and randomization are mishandled. The application can reuse a session via PHPSESSID. Also, an attacker can exploit this vulnerability in conjunction with CVE-2020-12256 or CVE-2020-12259.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.71%

74.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-384

Affected Software

Vendor	Product	Versions
Rconfig	Rconfig	3.9.4

References

https://gist.github.com/farid007/8855031bad0e497264e4879efb5bc9f8Third Party Advisory
https://gist.github.com/farid007/8855031bad0e497264e4879efb5bc9f8Third Party Advisory

Timeline

Published: May 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12258?

How severe is CVE-2020-12258?

CVE-2020-12258 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.71% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12258?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-12258?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST