How severe is CVE-2025-49845?

CVE-2025-49845 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 high, integrity none, and availability none.

Is CVE-2025-49845 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-2025-49845?

CVE-2025-49845 affects Discourse. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-49845?

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-2025-49845 have an EU (EUVD) identifier?

Yes. CVE-2025-49845 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19108.

When was CVE-2025-49845 published?

CVE-2025-49845 was published on 2025-06-25 and last updated on 2026-06-17.

CVE-2025-49845

CVE-2025-49845 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.3
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19108
Weakness: CWE-200
Affected product: Discourse
Published: 2025-06-25
Last modified: 2026-06-17

Description

Discourse is an open-source discussion platform. The visibility of posts typed `whisper` is controlled via the `whispers_allowed_groups` site setting. Only users that belong to groups specified in the site setting are allowed to view posts typed `whisper`. However, it has been discovered that users of versions prior to 3.4.6 on the `stable` branch and prior to 3.5.0.beta8-dev on the `tests-passed` branch can continue to see their own whispers even after losing visibility of posts typed `whisper`. This issue is patched in versions 3.4.6 and 3.5.0.beta8-dev. No known workarounds are available.

Frequently asked questions

What is CVE-2025-49845?: Discourse is an open-source discussion platform. The visibility of posts typed `whisper` is controlled via the `whispers_allowed_groups` site setting. Only users that belong to groups specified in the site setting are allowed to view posts typed `whisper`. However, it has been discovered that users of versions prior to 3.4.6 on the `stable` branch and prior to 3.5.0.beta8-dev on the `tests-passed` branch can continue to see their own whispers even after losing visibility of posts typed `whisper`. This issue is patched in versions 3.4.6 and 3.5.0.beta8-dev. No known workarounds are available.
How severe is CVE-2025-49845?: CVE-2025-49845 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 high, integrity none, and availability none.
Is CVE-2025-49845 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-2025-49845?: CVE-2025-49845 affects Discourse. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-49845?: 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-2025-49845 have an EU (EUVD) identifier?: Yes. CVE-2025-49845 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19108.
When was CVE-2025-49845 published?: CVE-2025-49845 was published on 2025-06-25 and last updated on 2026-06-17.

References

https://github.com/discourse/discourse/security/advisories/GHSA-79qw-r73r-69gf

Affected products (1)

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

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