CVE-2025-48700
📛 CVE Title
CVE-2025-48700
Description
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mitre
- CVSS severity
- —
- CVSS score
- —
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:N- Effective score
- 6.1 / 10 MEDIUM source: NVD
- CWE(s)
- —
- Reserved
- 2025-05-23
- Published
- 2025-06-23 02:00 UTC
- Last updated
- 2026-04-21 05:55 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/48xxx/CVE-2025-48700.json
CISA Known Exploited Vulnerabilities CISA KEV
CISA has confirmed in-the-wild exploitation of this CVE. Federal agencies must remediate by the due date below; private orgs should treat it as priority-1.
- Vulnerability name
- Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability
- Vendor / project
- Synacor
- Product
- Zimbra Collaboration Suite (ZCS)
- Date added to KEV
- 2026-04-20
- Remediation due
- 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.
- Ransomware campaign use
- Unknown
- CISA notes
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://nvd.nist.gov/vuln/detail/CVE-2025-48700
- CISA listing
- www.cisa.gov/known-exploited-vulnerabilities-catalog
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2025-06-23 15:15:27 UTC
- NVD last modified
- 2026-06-17 09:30:11 UTC
- NVD CVSS v3.1
- 6.1 / 10 MEDIUM source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Exploitability subscore
- 2.8 / 10
- Impact subscore
- 2.7 / 10
- EPSS score
- 0.0176 (probability of exploitation in next 30 days)
- EPSS percentile
- 75.19% vs all CVEs — higher = more likely to be exploited, as of 2026-06-27
NVD-assigned CWE(s):
CWE-79
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-06-28 11:08 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2025-18891 - Assigner
- mitre
- Published
- Jun 23, 2025, 12:00:00 AM
- Updated
- Apr 21, 2026, 3:55:38 AM
- EUVD base score (CVSS 3.1)
-
6.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EUVD-reported EPSS
- 18.1900
- Vendors
- n/a
- Products
-
n/a (n/a)
- Aliases
-
GHSA-wmq6-ffv7-gqwf
ENISA description: 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.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| n/a | n/a |
n/a (affected)
|
— |
Affected products — CPE 2.3 (93) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
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Vendor references (3)
References embedded in the original CVE record by the assigning CNA.
Web references (7)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://cwe.mitre.org/data/definitions/79.html rapid7:cwe.mitre.org
- https://attackerkb.com/topics/CVE-2025-48700 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-18891 rapid7:euvd.enisa.europa.eu
- https://wiki.zimbra.com/wiki/Security_Center rapid7:wiki.zimbra.com
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy rapid7:wiki.zimbra.com
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories rapid7:wiki.zimbra.com
- https://www.cve.org/CVERecord?id=CVE-2025-48700 rapid7:www.cve.org
NVD-tagged references (4)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://wiki.zimbra.com/wiki/Security_Center cve@mitre.org Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy cve@mitre.org Product
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories cve@mitre.org Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-48700 134c704f-9b21-4f2e-91b3-4a467353bcc0 US Government Resource
Remediations (10)
-
web:blog.qualys.com
As cybersecurity threats evolve, Microsoft's October 2025 Patch Tuesday delivers one of the most comprehensive security updates of the year. Here's a quick breakdown of what you need to know.
2026-05-23 11:07 UTC -
web:blog.zerobot.info
Over 10,500 Zimbra Collaboration Suite servers exposed to the internet are still unpatched against CVE-2025-48700 , an actively exploited cross-site scripting flaw. CISA has added the vulnerability to its Known Exploited Vulnerabilities catalog and ordered federal agencies to patch within three days.
2026-05-23 11:07 UTC -
web:fieldeffect.com
Microsoft's October 2025 Patch Tuesday fixes 175 vulnerabilities, including three zero-days under active exploitation and eight critical flaws requiring urgent patching.
2026-05-23 11:07 UTC -
web:isc.sans.edu
Microsoft Patch Tuesday, July 2025 , Author: Johannes Ullrich
2026-05-23 11:07 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-23 11:07 UTC -
web:www.crowdstrike.com
Microsoft has released security updates for 121 vulnerabilities, including one actively exploited zero-day and 11 critical, in its April 2025 Patch Tuesday rollout.
2026-05-23 11:07 UTC -
web:www.forbes.com
Microsoft has confirmed that SharePoint Server is under mass global attack. Breaking: An emergency patch has now been released — update immediately.
2026-05-23 11:07 UTC -
web:www.ninjaone.com
Catalog of Microsoft KB updates with insights on performance & user sentiment. Find out what's working, what's not, & make informed decisions.
2026-05-23 11:07 UTC -
web:www.oracle.com
Oracle Critical Patch Update Advisory - October 2025 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical ...
2026-05-23 11:07 UTC -
web:www.techradar.com
Pro Security Microsoft's latest major patch fixes a serious zero-day flaw, and a host of other issues - so update now News By Sead Fadilpašić published August 13, 2025
2026-05-23 11:07 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2025-48700.json.
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