medium Known exploitedREV. 01

CVE-2025-48700Zimbra Collaboration — script injection in the Classic interface

Zimbra Collaboration 8.8.15, 9.0, 10.0 and 10.1 do not sanitise message markup thoroughly enough, so simply viewing a crafted e-mail in the Classic interface runs the sender's JavaScript inside the reader's session.

YOUR NEXT MOVE

Update Zimbra to a build carrying the Security Center fix now; where users are still on the Classic interface, move them to the modern one.

Read the risk

THE VITAL STATS
CVSS score
6.1/ 10
CVSS v3.1
EPSS probability
2%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2025-06-23
Added to KEV
2026-04-20
Exploit published
Not recorded
Confidence
high
Kill chain
execution
MITRE ATT&CK
T1059.007
Severity
medium

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

Attacker needsThe victim must open a crafted message in the Zimbra Classic interface.

Behind the card

3 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2025-48700 · CRDS 0.1 · Issued 2026-09-24