How severe is CVE-2020-21316?

CVE-2020-21316 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-21316 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21316?

CVE-2020-21316 affects Zrlog. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-21316?

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

When was CVE-2020-21316 published?

CVE-2020-21316 was published on 2021-06-15 and last updated on 2026-06-17.

CVE-2020-21316

CVE-2020-21316 is a medium-severity vulnerability in Zrlog with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Zrlog
Published: 2021-06-15
Last modified: 2026-06-17

Description

A Cross-site scripting (XSS) vulnerability exists in the comment section in ZrLog 2.1.3, which allows remote attackers to inject arbitrary web script and stolen administrator cookies via the nickname parameter and gain access to the admin panel.

Frequently asked questions

What is CVE-2020-21316?: A Cross-site scripting (XSS) vulnerability exists in the comment section in ZrLog 2.1.3, which allows remote attackers to inject arbitrary web script and stolen administrator cookies via the nickname parameter and gain access to the admin panel.
How severe is CVE-2020-21316?: CVE-2020-21316 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-21316 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21316?: CVE-2020-21316 affects Zrlog. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-21316?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-21316 published?: CVE-2020-21316 was published on 2021-06-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zrlog:zrlog:2.1.3:*:*:*:*:*:*:*

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