How severe is CVE-2020-5539?

CVE-2020-5539 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-5539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5539?

CVE-2020-5539 primarily affects Grandit. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5539?

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

When was CVE-2020-5539 published?

CVE-2020-5539 was published on 2020-03-02 and last updated on 2026-06-17.

CVE-2020-5539

CVE-2020-5539 is a medium-severity vulnerability in Grandit with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.4
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Grandit
Published: 2020-03-02
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-5539?: CVE-2020-5539 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-5539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5539?: CVE-2020-5539 primarily affects Grandit. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5539?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-5539 published?: CVE-2020-5539 was published on 2020-03-02 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:grandit:grandit:1.6:*:*:*:*:*:*:*
cpe:2.3:a:grandit:grandit:2.0:*:*:*:*:*:*:*
cpe:2.3:a:grandit:grandit:2.1:*:*:*:*:*:*:*
cpe:2.3:a:grandit:grandit:2.2:*:*:*:*:*:*:*
cpe:2.3:a:grandit:grandit:2.3:*:*:*:*:*:*:*
cpe:2.3:a:grandit:grandit:3.0:*:*:*:*:*:*:*

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