How severe is CVE-2024-35227?

CVE-2024-35227 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-35227 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-35227?

CVE-2024-35227 affects Discourse. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-35227?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-35227 have an EU (EUVD) identifier?

Yes. CVE-2024-35227 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-35249.

When was CVE-2024-35227 published?

CVE-2024-35227 was published on 2024-07-03 and last updated on 2026-06-17.

CVE-2024-35227

CVE-2024-35227 is a high-severity vulnerability in Discourse with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-35249
Weakness: CWE-20
Affected product: Discourse
Published: 2024-07-03
Last modified: 2026-06-17

Description

Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, Oneboxing against a carefully crafted malicious URL can reduce the availability of a Discourse instance. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. There are no known workarounds available for this vulnerability.

Frequently asked questions

What is CVE-2024-35227?: Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, Oneboxing against a carefully crafted malicious URL can reduce the availability of a Discourse instance. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. There are no known workarounds available for this vulnerability.
How severe is CVE-2024-35227?: CVE-2024-35227 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-35227 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-35227?: CVE-2024-35227 affects Discourse. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-35227?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-35227 have an EU (EUVD) identifier?: Yes. CVE-2024-35227 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-35249.
When was CVE-2024-35227 published?: CVE-2024-35227 was published on 2024-07-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*

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