CVE-2025-48700 (GCVE-0-2025-48700)
Vulnerability from cvelistv5
Published
2025-06-23 00:00
Modified
2026-04-21 03:55
CWE
  • n/a
Summary
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0 and 10.0 and 10.1. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information. This issue arises from insufficient sanitization of HTML content, specifically involving crafted tag structures and attribute values that include an @import directive and other script injection vectors. The vulnerability is triggered when a user views a crafted e-mail message in the Classic UI, requiring no additional user interaction.
Impacted products
Vendor Product Version
n/a n/a Version: n/a
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog

Date added: 2026-04-20

Due date: 2026-04-23

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Used in ransomware: Unknown

Notes: https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://nvd.nist.gov/vuln/detail/CVE-2025-48700

Show details on NVD website


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            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.1,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
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        {
          "url": "https://wiki.zimbra.com/wiki/Security_Center"
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          "url": "https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy"
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    "cveId": "CVE-2025-48700",
    "datePublished": "2025-06-23T00:00:00.000Z",
    "dateReserved": "2025-05-23T00:00:00.000Z",
    "dateUpdated": "2026-04-21T03:55:38.511Z",
    "state": "PUBLISHED"
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      "dueDate": "2026-04-23",
      "knownRansomwareCampaignUse": "Unknown",
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      "product": "Zimbra Collaboration Suite (ZCS)",
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      "shortDescription": "Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that could allow attackers to execute arbitrary JavaScript within the user\u0027s session, potentially leading to unauthorized access to sensitive information.",
      "vendorProject": "Synacor",
      "vulnerabilityName": "Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability"
    }
  }
}


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