How severe is CVE-2023-49276?

CVE-2023-49276 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2023-49276 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-49276?

CVE-2023-49276 affects Uptime.kuma Uptime Kuma. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-49276?

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

When was CVE-2023-49276 published?

CVE-2023-49276 was published on 2023-12-01 and last updated on 2026-06-17.

CVE-2023-49276

CVE-2023-49276 is a medium-severity vulnerability in Uptime.kuma Uptime Kuma with a CVSS 3.x base score of 6.3. 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 6.3)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Uptime.kuma Uptime Kuma
Published: 2023-12-01
Last modified: 2026-06-17

Description

Uptime Kuma is an open source self-hosted monitoring tool. In affected versions the Google Analytics element in vulnerable to Attribute Injection leading to Cross-Site-Scripting (XSS). Since the custom status interface can set an independent Google Analytics ID and the template has not been sanitized, there is an attribute injection vulnerability here, which can lead to XSS attacks. This vulnerability has been addressed in commit `f28dccf4e` which is included in release version 1.23.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Frequently asked questions

What is CVE-2023-49276?: Uptime Kuma is an open source self-hosted monitoring tool. In affected versions the Google Analytics element in vulnerable to Attribute Injection leading to Cross-Site-Scripting (XSS). Since the custom status interface can set an independent Google Analytics ID and the template has not been sanitized, there is an attribute injection vulnerability here, which can lead to XSS attacks. This vulnerability has been addressed in commit `f28dccf4e` which is included in release version 1.23.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
How severe is CVE-2023-49276?: CVE-2023-49276 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2023-49276 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-49276?: CVE-2023-49276 affects Uptime.kuma Uptime Kuma. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-49276?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-49276 published?: CVE-2023-49276 was published on 2023-12-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:uptime.kuma:uptime_kuma:*:*:*:*:*:*:*:*

More vulnerabilities in Uptime.kuma Uptime Kuma

CVE-2023-49804 — Medium (CVSS 6.7): Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, when a user changes their login…
CVE-2023-44400 — Medium (CVSS 6.7): Uptime Kuma is a self-hosted monitoring tool. Prior to version 1.23.3, attackers with access to a user's device can…
CVE-2026-33130 — Medium (CVSS 6.5): Uptime Kuma is an open source, self-hosted monitoring tool. In versions 1.23.0 through 2.2.0, the fix from…
CVE-2023-49805 — Medium (CVSS 6.0): Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, the application uses WebSocket…
CVE-2026-32230 — Medium (CVSS 5.3): Uptime Kuma is an open source, self-hosted monitoring tool. From 2.0.0 to 2.1.3 , the GET…

All CVEs affecting Uptime.kuma Uptime Kuma →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →