CVE-2020-10194Network attack vector

Cross-domain GAL disclosure via missing domain check

Published Mar 20, 2020 · Updated Aug 4, 2024

Missing authorization in Zimbra zm-mailbox before 8.8.15.p8 allows remote authenticated users to read GAL contacts across domains. AutoCompleteGal resolves a caller-supplied galsync account ID and starts the search without checking that its domain matches the authenticated account's domain. Any authenticated account on a multi-domain installation can expose GAL contact data from another hosted domain; unauthenticated requests remain outside the reported attack path.

CVSS severity6.5
Medium
EPSS probability1.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Zimbra zm-mailbox before 8.8.15.p8 allows remote authenticated users to read GAL contacts across domains. AutoCompleteGal resolves a caller-supplied galsync account ID and starts the search without checking that its domain matches the authenticated account's domain. Any authenticated account on a multi-domain installation can expose GAL contact data from another hosted domain; unauthenticated requests remain outside the reported attack path.

The record

CVE
CVE-2020-10194
Published
Mar 20, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1087.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 20, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.0NVDAV:N/AC:L/Au:S/C:N/I:P/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1087.003Email Account

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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