How severe is CVE-2024-45303?

CVE-2024-45303 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-2024-45303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-45303?

CVE-2024-45303 affects Discourse Calendar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-45303?

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

Does CVE-2024-45303 have an EU (EUVD) identifier?

Yes. CVE-2024-45303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41427.

When was CVE-2024-45303 published?

CVE-2024-45303 was published on 2024-09-12 and last updated on 2026-06-17.

CVE-2024-45303

CVE-2024-45303 is a medium-severity vulnerability in Discourse Calendar 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: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-41427
Weakness: CWE-79
Affected product: Discourse Calendar
Published: 2024-09-12
Last modified: 2026-06-17

Description

Discourse Calendar plugin adds the ability to create a dynamic calendar in the first post of a topic to Discourse. Rendering event names can be susceptible to XSS attacks. This vulnerability only affects sites which have modified or disabled Discourse’s default Content Security Policy. The issue is patched in version 0.5 of the Discourse Calendar plugin.

Frequently asked questions

What is CVE-2024-45303?: Discourse Calendar plugin adds the ability to create a dynamic calendar in the first post of a topic to Discourse. Rendering event names can be susceptible to XSS attacks. This vulnerability only affects sites which have modified or disabled Discourse’s default Content Security Policy. The issue is patched in version 0.5 of the Discourse Calendar plugin.
How severe is CVE-2024-45303?: CVE-2024-45303 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-2024-45303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-45303?: CVE-2024-45303 affects Discourse Calendar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-45303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-45303 have an EU (EUVD) identifier?: Yes. CVE-2024-45303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41427.
When was CVE-2024-45303 published?: CVE-2024-45303 was published on 2024-09-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:discourse:calendar:*:*:*:*:*:*:*:*

More vulnerabilities in Discourse Calendar

CVE-2024-26145 — Medium (CVSS 6.5): Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on Discourse. Uninvited…
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