How severe is CVE-2025-58054?

CVE-2025-58054 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-58054 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-58054?

CVE-2025-58054 primarily affects Discourse. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-58054?

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

Does CVE-2025-58054 have an EU (EUVD) identifier?

Yes. CVE-2025-58054 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33227.

When was CVE-2025-58054 published?

CVE-2025-58054 was published on 2025-10-01 and last updated on 2026-06-17.

CVE-2025-58054

CVE-2025-58054 is a low-severity vulnerability in Discourse with a CVSS 3.x base score of 3.5. 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-80.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-33227
Weakness: CWE-80
Affected product: Discourse
Published: 2025-10-01
Last modified: 2026-06-17

Description

Discourse is an open-source community discussion platform. Versions 3.5.0 and below are vulnerable to XSS attacks through parsing and rendering of chat channel titles and chat thread titles via the quote message functionality when using the rich text editor. This issue is fixed in version 3.5.1.

Frequently asked questions

What is CVE-2025-58054?: Discourse is an open-source community discussion platform. Versions 3.5.0 and below are vulnerable to XSS attacks through parsing and rendering of chat channel titles and chat thread titles via the quote message functionality when using the rich text editor. This issue is fixed in version 3.5.1.
How severe is CVE-2025-58054?: CVE-2025-58054 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-58054 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-58054?: CVE-2025-58054 primarily affects Discourse. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-58054?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-58054 have an EU (EUVD) identifier?: Yes. CVE-2025-58054 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33227.
When was CVE-2025-58054 published?: CVE-2025-58054 was published on 2025-10-01 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*
cpe:2.3:a:discourse:discourse:3.6.0:beta1:*:*:beta:*:*:*

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