How severe is CVE-2024-43789?

CVE-2024-43789 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-2024-43789 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-43789?

CVE-2024-43789 primarily affects Discourse. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-43789?

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-2024-43789 have an EU (EUVD) identifier?

Yes. CVE-2024-43789 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-40449.

When was CVE-2024-43789 published?

CVE-2024-43789 was published on 2024-10-07 and last updated on 2026-06-17.

CVE-2024-43789

CVE-2024-43789 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-40449
Weakness: CWE-400
Affected product: Discourse
Published: 2024-10-07
Last modified: 2026-06-17

Description

Discourse is an open source platform for community discussion. A user can create a post with many replies, and then attempt to fetch them all at once. This can potentially reduce the availability of a Discourse instance. This problem has been patched in the latest version of Discourse. All users area are advised to upgrade. There are no known workarounds for this vulnerability.

Frequently asked questions

What is CVE-2024-43789?: Discourse is an open source platform for community discussion. A user can create a post with many replies, and then attempt to fetch them all at once. This can potentially reduce the availability of a Discourse instance. This problem has been patched in the latest version of Discourse. All users area are advised to upgrade. There are no known workarounds for this vulnerability.
How severe is CVE-2024-43789?: CVE-2024-43789 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-2024-43789 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-43789?: CVE-2024-43789 primarily affects Discourse. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-43789?: 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-2024-43789 have an EU (EUVD) identifier?: Yes. CVE-2024-43789 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-40449.
When was CVE-2024-43789 published?: CVE-2024-43789 was published on 2024-10-07 and last updated on 2026-06-17.

References

https://github.com/discourse/discourse/security/advisories/GHSA-62cq-cpmc-hvqq

Affected products (2)

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

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