Security readout for executives and security teams
Plain-English summary
This flaw can let someone tell whether Zimbra accounts exist or are inactive by comparing different error responses. It is not described as direct mailbox access, but it can make targeted phishing, credential attacks, or account clean-up evasion easier.
Executive priority
Treat this as a targeted-risk cleanup item, not an emergency based on the supplied evidence. Prioritize internet-facing Zimbra systems and legacy 8.6 deployments because account enumeration can increase the effectiveness of later credential attacks.
Technical view
Zimbra Collaboration Suite mailboxd returned distinguishable HTTP errors: 404 for inactive accounts and 401 when authentication was required. The discrepancy allowed account enumeration in 8.8 before 8.8.8, 8.7 before 8.7.11 Patch 3, and 8.6.
Likely exposure
Exposure is most likely where affected Zimbra Collaboration Suite mailboxd services are reachable, especially internet-facing deployments on the listed versions. The source bundle does not identify affected CPEs or deployment-specific preconditions beyond the Zimbra version ranges.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation claims. The weakness supports reconnaissance rather than confirmed direct compromise, but enumerated accounts can improve targeting for phishing, credential stuffing, or password-spraying campaigns.
Researcher notes
The CVE text attributes the issue to inconsistent HTTP 404 and 401 responses in mailboxd. No CVSS, CWE, exploit evidence, or detailed vendor remediation text is provided in the supplied sources, so assessment confidence is limited to the named versions and behavior.
Mitigation direction
- Upgrade Zimbra 8.8 deployments to 8.8.8 or later.
- Upgrade Zimbra 8.7 deployments to 8.7.11 Patch 3 or later.
- For Zimbra 8.6, check Zimbra guidance for supported upgrade or mitigation paths.
- Limit public exposure of mailboxd endpoints where business requirements allow.
- Monitor authentication and account-discovery patterns around Zimbra services.
Validation and detection
- Inventory all Zimbra Collaboration Suite versions and mailboxd exposure points.
- Confirm no 8.8 versions below 8.8.8 remain deployed.
- Confirm no 8.7 versions below 8.7.11 Patch 3 remain deployed.
- Review edge logs for abnormal unauthenticated requests to Zimbra account-related paths.
- Verify externally reachable Zimbra services return consistent non-enumerating errors after remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-10949 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.zimbra.com/show_bug.cgi?id=108962CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.