CriticalCVECISA — Known Exploited Vulnerabilities· 20 Apr 2026

CVE-2025-48700 — Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability

Severity: Critical · Kind: Vulnerability

What it is

AI offline placeholder summary for: Title: CVE-2025-48700 — Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scri.

Who this affects

AI summarisation is currently disabled — see the source link for the full upstream advisory.

What to do

Re-run summarisation from /admin/threats once ANTHROPIC_API_KEY is configured.

From the source

Synacor Zimbra Collaboration Suite (ZCS). Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that could allow attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information. 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.

Vulnerability facts

CVE: CVE-2025-48700
On CISA KEV since: 2026-04-20
Ransomware use: Unknown

Read the original advisory →← All threat intel

Was this useful?

00000Sign in to react

Plain-English summaries are AI-generated and reviewed for tone, not technical accuracy. For incident response, always rely on the original source linked above.