How severe is CVE-2023-26777?

CVE-2023-26777 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-2023-26777 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-26777?

CVE-2023-26777 affects Uptime Kuma Project Uptime Kuma. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-26777?

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

When was CVE-2023-26777 published?

CVE-2023-26777 was published on 2023-04-04 and last updated on 2026-06-17.

CVE-2023-26777

CVE-2023-26777 is a medium-severity vulnerability in Uptime Kuma Project Uptime Kuma 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)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Uptime Kuma Project Uptime Kuma
Published: 2023-04-04
Last modified: 2026-06-17

Description

Cross Site Scripting vulnerability found in : louislam Uptime Kuma v.1.19.6 and before allows a remote attacker to execute arbitrary commands via the description, title, footer, and incident creation parameter of the status_page.js endpoint.

Frequently asked questions

What is CVE-2023-26777?: Cross Site Scripting vulnerability found in : louislam Uptime Kuma v.1.19.6 and before allows a remote attacker to execute arbitrary commands via the description, title, footer, and incident creation parameter of the status_page.js endpoint.
How severe is CVE-2023-26777?: CVE-2023-26777 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-2023-26777 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-26777?: CVE-2023-26777 affects Uptime Kuma Project Uptime Kuma. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-26777?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-26777 published?: CVE-2023-26777 was published on 2023-04-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:uptime_kuma_project:uptime_kuma:*:*:*:*:*:*:*:*

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