CVE-2025-34521: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Arcserve Unified Data Protection (UDP)
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.
AI Analysis
Technical Summary
This vulnerability is a reflected XSS (CWE-79) in Arcserve UDP's web interface, where unsanitized user input is improperly reflected in HTTP responses. Attackers with low privileges can create malicious URLs that, when visited by other users, execute arbitrary JavaScript code in their browsers. The vulnerability affects all UDP versions before 10.2. UDP 10.2 contains the necessary patches to fix this issue. Supported versions 8.0 through 10.1 require patching or upgrading, while unsupported versions 7.x and earlier must be upgraded to 10.2 to address the vulnerability. The CVSS 4.0 base score is 4.8, indicating medium severity.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary JavaScript in the context of the victim's browser, potentially leading to session hijacking, credential theft, or other client-side impacts. The attack requires user interaction and occurs within a shared browser context. There are no known exploits in the wild at this time.
Mitigation Recommendations
Arcserve UDP version 10.2 includes the necessary patches to remediate this vulnerability and requires no further action. Users running supported versions 8.0 through 10.1 should apply the patch or upgrade to version 10.2. Versions 7.x and earlier, which are unsupported, must be upgraded to 10.2 to resolve the issue. Patch status is confirmed by the vendor advisory embedded in the description.
CVE-2025-34521: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Arcserve Unified Data Protection (UDP)
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.
CVSS v4.0
Score 4.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a reflected XSS (CWE-79) in Arcserve UDP's web interface, where unsanitized user input is improperly reflected in HTTP responses. Attackers with low privileges can create malicious URLs that, when visited by other users, execute arbitrary JavaScript code in their browsers. The vulnerability affects all UDP versions before 10.2. UDP 10.2 contains the necessary patches to fix this issue. Supported versions 8.0 through 10.1 require patching or upgrading, while unsupported versions 7.x and earlier must be upgraded to 10.2 to address the vulnerability. The CVSS 4.0 base score is 4.8, indicating medium severity.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary JavaScript in the context of the victim's browser, potentially leading to session hijacking, credential theft, or other client-side impacts. The attack requires user interaction and occurs within a shared browser context. There are no known exploits in the wild at this time.
Mitigation Recommendations
Arcserve UDP version 10.2 includes the necessary patches to remediate this vulnerability and requires no further action. Users running supported versions 8.0 through 10.1 should apply the patch or upgrade to version 10.2. Versions 7.x and earlier, which are unsupported, must be upgraded to 10.2 to resolve the issue. Patch status is confirmed by the vendor advisory embedded in the description.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2025-04-15T19:15:22.612Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 68af7981ad5a09ad006645bf
Added to database: 08/27/2025, 21:32:49 UTC
Last enriched: 05/21/2026, 12:10:24 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 204
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