How severe is CVE-2024-39320?

CVE-2024-39320 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-2024-39320 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-39320?

CVE-2024-39320 primarily affects Discourse. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-39320?

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

Does CVE-2024-39320 have an EU (EUVD) identifier?

Yes. CVE-2024-39320 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37898.

When was CVE-2024-39320 published?

CVE-2024-39320 was published on 2024-07-30 and last updated on 2026-06-17.

CVE-2024-39320

CVE-2024-39320 is a medium-severity vulnerability in Discourse 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-1021.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-37898
Weakness: CWE-1021
Affected product: Discourse
Published: 2024-07-30
Last modified: 2026-06-17

Description

Discourse is an open source discussion platform. Prior to 3.2.5 and 3.3.0.beta5, the vulnerability allows an attacker to inject iframes from any domain, bypassing the intended restrictions enforced by the allowed_iframes setting. This vulnerability is fixed in 3.2.5 and 3.3.0.beta5.

Frequently asked questions

What is CVE-2024-39320?: Discourse is an open source discussion platform. Prior to 3.2.5 and 3.3.0.beta5, the vulnerability allows an attacker to inject iframes from any domain, bypassing the intended restrictions enforced by the allowed_iframes setting. This vulnerability is fixed in 3.2.5 and 3.3.0.beta5.
How severe is CVE-2024-39320?: CVE-2024-39320 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-2024-39320 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-39320?: CVE-2024-39320 primarily affects Discourse. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-39320?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-39320 have an EU (EUVD) identifier?: Yes. CVE-2024-39320 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37898.
When was CVE-2024-39320 published?: CVE-2024-39320 was published on 2024-07-30 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
cpe:2.3:a:discourse:discourse:3.3.0:beta1:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.3.0:beta2:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.3.0:beta3:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.3.0:beta4:*:*:beta:*:*:*

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