How severe is CVE-2024-35234?

CVE-2024-35234 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2024-35234 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-35234?

CVE-2024-35234 primarily affects Discourse. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-35234?

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

Does CVE-2024-35234 have an EU (EUVD) identifier?

Yes. CVE-2024-35234 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-35251.

When was CVE-2024-35234 published?

CVE-2024-35234 was published on 2024-07-03 and last updated on 2026-06-17.

CVE-2024-35234

CVE-2024-35234 is a medium-severity vulnerability in Discourse with a CVSS 3.x base score of 4.2. 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 4.2)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-35251
Weakness: CWE-79
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, an attacker can execute arbitrary JavaScript on users’ browsers by posting a specific URL containing maliciously crafted meta tags. This issue only affects sites with Content Security Polic (CSP) disabled. 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. As a workaround, ensure CSP is enabled on the forum.

Frequently asked questions

What is CVE-2024-35234?: 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, an attacker can execute arbitrary JavaScript on users’ browsers by posting a specific URL containing maliciously crafted meta tags. This issue only affects sites with Content Security Polic (CSP) disabled. 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. As a workaround, ensure CSP is enabled on the forum.
How severe is CVE-2024-35234?: CVE-2024-35234 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2024-35234 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-35234?: CVE-2024-35234 primarily affects Discourse. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-35234?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-35234 have an EU (EUVD) identifier?: Yes. CVE-2024-35234 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-35251.
When was CVE-2024-35234 published?: CVE-2024-35234 was published on 2024-07-03 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.3.0:beta1:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.3.0:beta2:*:*:beta:*:*:*

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