CVE-2025-48062

Discourse vulnerable to HTML injection when inviting to topic via email

Description

Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, certain invites via email may result in HTML injection in the email body if the topic title includes HTML. This includes inviting someone (without an account) to a PM and inviting someone (without an account) to a topic with a custom message. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. This can be worked around if the relevant templates are overridden without `{topic_title}`.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.04%
Affected: discourse discourse
Published at:
Updated at:

References

Link Tags
https://github.com/discourse/discourse/security/advisories/GHSA-x8mp-chx3-6x2p

Frequently Asked Questions

What is the severity of CVE-2025-48062?
CVE-2025-48062 has been scored as a high severity vulnerability.
How to fix CVE-2025-48062?
To fix CVE-2025-48062, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-48062 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-48062 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-48062?
CVE-2025-48062 affects discourse discourse.
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