CVE-2025-61598

Q: How do I fix CVE-2025-61598?

Upgrade discourse to 3.5.2 or later.

Q: Is CVE-2025-61598 being actively exploited?

Not that we know of. CVE-2025-61598 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.28% is the estimated probability that it will be exploited in the next 30 days. That is higher than 20% of all scored CVEs.

Q: How severe is CVE-2025-61598?

CVE-2025-61598 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2025-61598 affect?

Published advisories record a fix for discourse (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

5.3

CVSS v3

NVD

Description

Discourse is an open source discussion platform. Version before 3.6.2 and 3.6.0.beta2, default Cache-Control response header with value no-store, no-cache was missing from error responses. This may caused unintended caching of those responses by proxies potentially leading to cache poisoning attacks. This vulnerability is fixed in 3.6.2 and 3.6.0.beta2.

CWE-524

How to fix

Remediation Available

discourseNVD

Affected:< 3.5.2Fixed in:3.5.2CVE-2025-61598derived from NVD

Affected:< 3.6.0Fixed in:3.6.0CVE-2025-61598derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Patch2

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-524 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-9494	Medium	5.9	3.9%	-	Fix
CVE-2021-24027	High	7.5	3.8%	-	Fix
CVE-2019-9495	Low	3.7	3.4%	-	Fix
CVE-2019-14997	Medium	4.3	1.2%	-	Fix
CVE-2024-0874	Medium	5.3	0.8%	-	Fix
CVE-2024-45596	High	7.4	0.6%	-	Fix

Common questions

How do I fix CVE-2025-61598?

Upgrade discourse to 3.5.2 or later.

Is CVE-2025-61598 being actively exploited?

Not that we know of. CVE-2025-61598 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.28% is the estimated probability that it will be exploited in the next 30 days. That is higher than 20% of all scored CVEs.

How severe is CVE-2025-61598?

CVE-2025-61598 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-61598 affect?

Published advisories record a fix for discourse (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-03.