CVE-2026-33372Network attack vector

Unauthorized session actions via body-supplied CSRF tokens

Published Mar 20, 2026 · Updated Mar 20, 2026

CSRF in Zimbra Webmail 10.0 and 10.1 allows remote attackers to perform unauthorized actions through an authenticated user's session. The CSRF validator accepts a token in the request body rather than requiring the designated request header, allowing a crafted cross-origin request to pass validation. Exploitation requires an authenticated user to submit the crafted request; resulting actions are limited to that user's Zimbra privileges.

CVSS severity5.4
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Zimbra Webmail 10.0 and 10.1 allows remote attackers to perform unauthorized actions through an authenticated user's session. The CSRF validator accepts a token in the request body rather than requiring the designated request header, allowing a crafted cross-origin request to pass validation. Exploitation requires an authenticated user to submit the crafted request; resulting actions are limited to that user's Zimbra privileges.

The record

CVE
CVE-2026-33372
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, CAPEC-62, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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