What is CVE-2020-5539?

CVE-2020-5539 is a medium-severity vulnerability in Grandit, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2020-03-02.

How severe is CVE-2020-5539?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Grandit

CVE-2020-5539

GRANDIT Ver.1.6, Ver.2.0, Ver.2.1, Ver.2.2, Ver.2.3, and Ver.3.0 do not properly manage sessions, which allows remote attackers to impersonate an arbitrary user and then alter or disclose the information via unspecified vectors.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.008 (54.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Grandit — versions 1.6, 2.0, 2.1
Grandit Corporation — versions Ver.1.6, Ver.2.0, Ver.2.1, Ver.2.2, Ver.2.3, and Ver.3.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)
vultures@jpcert.or.jp (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-5539?: CVE-2020-5539 is a medium-severity vulnerability in Grandit, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2020-03-02.
How severe is CVE-2020-5539?: Medium severity. CVSS v3 base score is 6.5 out of 10.