VulnRadar

Data against noise.

Page generated: 11 Nov 2026, 13:23 UTC

CVE-2025-48700

Read full 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.

CVSS 6.1 (MEDIUM) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

7.9/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 6.1: +0.91
Fresh EPSS: 1.71%: +0.01

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 9 documents and public datasets.

Hype components

Headline sample (25%)

0/100

Press, 30 days (60%)

0/100

Grounded branding (15%)

0/100

HYPE TOTAL0/100

Sources and documents

BleepingComputer

Press · 10 Jul 2026, 07:00 · Zimbra urges customers to patch critical web client XSS flaw - BleepingComputer

Recorded Future

Press · 15 May 2026, 07:00 · April 2026 CVE Landscape - Recorded Future

SC Media

Press · 27 Apr 2026, 07:00 · Thousands of Zimbra servers vulnerable to actively exploited flaw - SC Media

BleepingComputer

Press · 24 Apr 2026, 07:00 · Over 10,000 Zimbra servers vulnerable to ongoing XSS attacks - BleepingComputer

Press · 21 Apr 2026, 07:00 · CISA Warns of Actively Exploited Cisco SD-WAN Flaw - Orders Urgent Federal Patching - LinkedIn

See all 9 source documents

SecurityWeek

Press · 21 Apr 2026, 07:00 · Organizations Warned of Exploited Cisco, Kentico, Zimbra Vulnerabilities - SecurityWeek

Hong Kong Computer Emergency Response Team Coordination Centre

Press · 21 Apr 2026, 07:00 · Zimbra Collaboration Suite Information Disclosure Vulnerability - Hong Kong Computer Emergency Response Team Coordination Centre

Help Net Security

Press · 21 Apr 2026, 07:00 · CISA flags another Cisco Catalyst SD-WAN Manager bug as exploited (CVE-2026-20133) - Help Net Security

The Hacker News

Press · 21 Apr 2026, 07:00 · CISA Adds 8 Exploited Flaws to KEV, Sets April-May 2026 Federal Deadlines - The Hacker News

Score evolution

● Hype ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 7.9 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence: Exploitation recorded
Priority basis: Recorded exploitation; CVSS 6.1; EPSS 1.7%
Attention, last 30 days: 0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential: network access, no prior privileges, user interaction.
Observed activity: Exploitation recorded in CISA KEV.
Known scale: Not quantified.
Evidence confidence basis: Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:59:39.188146+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

Published

23 Jun 2025, 00:00

Added to the CISA KEV catalog

20 Apr 2026, 00:00

First press mention

21 Apr 2026, 07:00

Latest press mention

10 Jul 2026, 07:00

Score calculated

05 Nov 2026, 13:59