Vulnerability-Lookup

GHSA-H7WG-85FJ-3C6G

Vulnerability from github – Published: 2026-01-05 15:32 – Updated: 2026-01-05 15:32

Details

Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.

Severity ?

7.2 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2025-66376"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-05T15:15:44Z",
    "severity": "HIGH"
  },
  "details": "Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.",
  "id": "GHSA-h7wg-85fj-3c6g",
  "modified": "2026-01-05T15:32:15Z",
  "published": "2026-01-05T15:32:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66376"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Security_Center"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18#Security_Fixes"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13#Security_Fixes"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy"
    },
    {
      "type": "WEB",
      "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-66376 (GCVE-0-2025-66376)

Vulnerability from cvelistv5 – Published: 2026-01-05 00:00 – Updated: 2026-01-05 20:42

Summary

Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.

Severity ?

7.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Assigner

mitre

References

URL

Tags

	https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
	https://wiki.zimbra.com/wiki/Security_Center
	https://wiki.zimbra.com/wiki/Zimbra_Responsible_D…
	https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1…
	https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0…

Impacted products

	Vendor	Product	Version
	Zimbra	Collaboration	Affected: 10.0 , < 10.0.18 (custom) Affected: 10.1 , < 10.1.13 (custom)

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JSON

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                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-05T20:41:21.735446Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-H7WG-85FJ-3C6G

CVE-2025-66376 (GCVE-0-2025-66376)

Tags

Sightings

Nomenclature