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CVE-2025-34521— Arcserve UDP < 10.2 Reflected Cross-Site Scripting (XSS)

Quick assessment

Affected
Arcserve Unified Data Protection (UDP)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Arcserve Unified Data Protection是Arcserve公司的一体化数据和勒索软件保护解决方案。 Arcserve Unified Data Protection 10.2之前版本存在安全漏洞，该漏洞源于反射型跨站脚本，可能导致会话劫持。

AI Predicted 6.1 Difficulty: Easy EPSS 0.22% · P11

Affected Version Matrix 3

VendorProduct Version RangeStatus
Arcserve Unified Data Protection (UDP) 10.2 unaffected
8.0≤ 10.1 affected
≤ 7.* affected
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I. Basic Information for CVE-2025-34521

Vulnerability Information
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Vulnerability Title
Arcserve UDP < 10.2 Reflected Cross-Site Scripting (XSS)
Source: CVE Program / CVE List V5
Vulnerability Description
A reflected cross-site scripting (XSS) vulnerability exists in the web interface of the Arcserve Unified Data Protection (UDP), where unsanitized user input is improperly reflected in HTTP responses. This flaw allows remote attackers with low privileges to craft malicious links that, when visited by another user, execute arbitrary JavaScript in the victim’s browser. Successful exploitation may lead to session hijacking, credential theft, or other client-side impacts. The vulnerability requires user interaction and occurs within a shared browser context. This vulnerability affects all UDP versions prior to 10.2. UDP 10.2 includes the necessary patches and requires no action. Versions 8.0 through 10.1 are supported and require either patch application or upgrade to 10.2. Versions 7.x and earlier are unsupported or out of maintenance and must be upgraded to 10.2 to remediate the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Arcserve Unified Data Protection 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Arcserve Unified Data Protection是Arcserve公司的一体化数据和勒索软件保护解决方案。 Arcserve Unified Data Protection 10.2之前版本存在安全漏洞，该漏洞源于反射型跨站脚本，可能导致会话劫持。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Arcserve Unified Data Protection (UDP) 8.0 ~ 10.1 -

II. Public POCs for CVE-2025-34521

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III. Intelligence Information for CVE-2025-34521

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Vendor Advisories for CVE-2025-34521 (1)

Same Patch Batch · Arcserve · 2025-08-27 · 4 CVEs total

CVE-2025-34523 9.2 CRITICAL Arcserve UDP < 10.2 Pre-Authentication Heap Overflow
CVE-2025-34520 Arcserve UDP < 10.2 Authentication Bypass
CVE-2025-34522 Arcserve UDP < 10.2 Pre-Authentication Heap Overflow

IV. Related Vulnerabilities

Same product: Unified Data Protection (UDP)
Same vendor: Arcserve
Same weakness: CWE-79

V. Comments for CVE-2025-34521

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