Which versions of Jsite are affected by CVE-2025-3970?

Organizations using baseweb JSite should be aware of moderate risk from CVE-2025-3970, a cross-site scripting vulnerability rated CVSS 5.1.

Is there a public PoC exploit available for CVE-2025-3970?

Yes, a public proof-of-concept exploit is available for CVE-2025-3970. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-3970?

Within 30 days: Identify affected systems running baseweb JSite and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Jsite CVE-2025-3970

Q: What is the CVSS score of CVE-2025-3970?

CVE-2025-3970 has a CVSS 4.0 base score of 5.1 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-04-27 cna@vuldb.com

Microsoft XSS Jsite

5.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.1 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:38 vuln.today

PoC Detected

May 12, 2025 - 19:08 vuln.today

Public exploit code

CVE Published

Apr 27, 2025 - 13:15 nvd

MEDIUM 5.1

DescriptionCVE.org

A vulnerability classified as problematic has been found in baseweb JSite up to 1.0. Affected is an unknown function of the file /sys/office/save. The manipulation of the argument Remarks leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

A vulnerability classified as problematic has been found in baseweb JSite up to 1.0. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A vulnerability classified as problematic has been found in baseweb JSite up to 1.0. Affected is an unknown function of the file /sys/office/save. The manipulation of the argument Remarks leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Affected products include: Jsite. Version information: up to 1.0..

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2025-3970 vulnerability details – vuln.today

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