CVE-2024-39031

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-07-09 · updated 2026-06-17
Weakness: CWE-79

Description

In Silverpeas Core <= 6.3.5, in Mes Agendas, a user can create new events and add them to their calendar. Additionally, users can invite others from the same domain, including administrators, to these events. A standard user can inject an XSS payload into the "Titre" and "Description" fields when creating an event and then add the administrator or any user to the event. When the invited user (victim) views their own profile, the payload will be executed on their side, even if they do not click on the event.

Affected products

Silverpeas: before 6.4 — fixed in 6.4

How to fix

Upgrade to a fixed version: Silverpeas 6.4. Check the vendor advisory for mitigations.

References

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