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CVE Record

CVE-2018-17542: SQL Injection exists in MailSherlock before 1.5.235 for OAKlouds

SQL Injection exists in MailSherlock before 1.5.235 for OAKlouds allows an unauthenticated user to extract the subjects of the emails of other users within the enterprise via the select_mid parameter in an letgo.cgi request.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2018-17542 is a SQL injection issue in OAKlouds MailSherlock before 1.5.235. The reported impact is unauthorized extraction of other users’ email subjects inside an enterprise. It affects confidentiality, not integrity or availability, based on the supplied CVSS data.

Executive priority

Treat this as a moderate confidentiality issue. Prioritize remediation if MailSherlock is internet-exposed, broadly accessible internally, or used for sensitive executive, legal, HR, or customer communications. The fix path appears version-based, but confirm with vendor guidance.

Technical view

The CVE describes SQL injection in the select_mid parameter of a letgo.cgi request. CVSS 3.0 is 4.3: network reachable, low complexity, no privileges, user interaction required, unchanged scope, and low confidentiality impact. The affected product is OAKlouds MailSherlock before 1.5.235.

Likely exposure

Exposure is likely limited to organizations running OAKlouds MailSherlock versions earlier than 1.5.235. Risk depends on whether the vulnerable web interface is reachable by users or external networks. The documented data exposure is email subject lines, which may still reveal sensitive business context.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Public detail is limited, but the vulnerability is remotely reachable according to CVSS and does not require privileges. Do not assume exploitation without environment-specific evidence.

Researcher notes

Evidence identifies MailSherlock before 1.5.235 and the vulnerable select_mid parameter in letgo.cgi. No CWE is supplied in the bundle. The description says unauthenticated access, while CVSS includes user interaction; document that discrepancy during triage.

Mitigation direction

  • Inventory OAKlouds MailSherlock deployments and identify any instance below version 1.5.235.
  • Upgrade affected MailSherlock installations to version 1.5.235 or later where available.
  • Restrict access to the MailSherlock web interface to trusted enterprise networks.
  • Review vendor or TWCERT guidance for any additional product-specific remediation.

Validation and detection

  • Confirm installed MailSherlock versions across production, staging, and legacy systems.
  • Check whether letgo.cgi is reachable from untrusted networks or unauthenticated users.
  • Review application and web logs for unusual requests involving select_mid.
  • Validate that upgraded systems report version 1.5.235 or later.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

Database behavior lookup

The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-17542 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.3CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4.3Medium
CVSS 3.0 vector shape for CVE-2018-17542Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
OAKloudsMailSherlockunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.