XSS in Silverpeas
CVE-2025-45055
Silverpeas 6.4.2 contains a stored cross-site scripting (XSS) vulnerability in the event management module. An authenticated user can upload a malicious SVG file as an event attachment, which, when viewed by an administrator, executes embedded JavaScript in the admin's session. This allows attackers to escalate privileges by creating a new administrator account. The vulnerability arises from insufficient sanitization of SVG files and weak CSRF protections.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Silverpeas — versions 6.4.2
Weakness classification (CWE)
References
- github.com/Silverpeas/Silverpeas-Core/pull/1394 (Patch)
- medium.com/@mingihongkim/privilege-escalation-via-svg-injection-in-silverpeas-6… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-45055?
- CVE-2025-45055 is a medium-severity vulnerability in Silverpeas, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-06-09.
- How severe is CVE-2025-45055?
- Medium severity. CVSS v3 base score is 5.4 out of 10.