CVE-2025-45055: Silverpeas 6.4.2 contains a stored cross-site scripting (XSS) vulnerability in the event management module

Routine

MEDIUM 5.4DOWNGRADE

CVE-2025-45055 is a medium-severity flaw (CVSS 5.4) affecting silverpeas. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 pr

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-06-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: silverpeas

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-09 16:15 UTCPublished CVE record published
2026-06-17 09:25 UTCUpdated Record last modified

silverpeas silverpeas DOWNGRADE

Affected: 6.4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.4.2

1. Check installed version

apt-cache policy silverpeas || rpm -q silverpeas || silverpeas --version

2. No fixed release: DOWNGRADE to a release before 6.4.2 (Debian / Ubuntu)

apt-cache madison silverpeas sudo apt install silverpeas=<VERSION_BEFORE_6.4.2> sudo apt-mark hold silverpeas

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list silverpeas sudo dnf downgrade silverpeas-<VERSION_BEFORE_6.4.2> sudo dnf versionlock add silverpeas

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-45055?

silverpeas: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-45055 being exploited?

CVE-2025-45055 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-45055 affect?

CVE-2025-45055 affects silverpeas. Severity is medium (CVSS 5.4). 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 embed

How urgent is CVE-2025-45055?

Priority 30/100. Public exploit reference

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References

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