How severe is CVE-2024-53266?

CVE-2024-53266 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-53266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-53266?

CVE-2024-53266 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-2024-53266?

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

Does CVE-2024-53266 have an EU (EUVD) identifier?

Yes. CVE-2024-53266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-51923.

When was CVE-2024-53266 published?

CVE-2024-53266 was published on 2025-02-04 and last updated on 2026-06-17.

CVE-2024-53266

CVE-2024-53266 is a medium-severity vulnerability in Discourse with a CVSS 3.x base score of 4.3. 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 4.3)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-51923
Weakness: CWE-79
Affected product: Discourse
Published: 2025-02-04
Last modified: 2026-06-17

Description

Discourse is an open source platform for community discussion. In affected versions with some combinations of plugins, and with CSP disabled, activity streams in the user's profile page may be vulnerable to XSS. This has been patched in the latest version of Discourse core. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled.

Frequently asked questions

What is CVE-2024-53266?: Discourse is an open source platform for community discussion. In affected versions with some combinations of plugins, and with CSP disabled, activity streams in the user's profile page may be vulnerable to XSS. This has been patched in the latest version of Discourse core. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled.
How severe is CVE-2024-53266?: CVE-2024-53266 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-53266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-53266?: CVE-2024-53266 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-2024-53266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-53266 have an EU (EUVD) identifier?: Yes. CVE-2024-53266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-51923.
When was CVE-2024-53266 published?: CVE-2024-53266 was published on 2025-02-04 and last updated on 2026-06-17.

References

https://github.com/discourse/discourse/security/advisories/GHSA-hw4j-4hg7-22h2

Affected products (5)

cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.4.0:beta1:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.4.0:beta2:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.4.0:beta3:*:*:beta:*:*:*

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