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CVE Record

CVE-2018-17454: An issue was discovered in GitLab Community and Enterprise Edition before 11.1.7, 11.2.x before 11.2.4, and...

An issue was discovered in GitLab Community and Enterprise Edition before 11.1.7, 11.2.x before 11.2.4, and 11.3.x before 11.3.1. There is stored XSS on the issue details screen.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2018-17454 is a stored cross-site scripting issue in GitLab issue details. A low-privileged user could store malicious content that affects another user who views the issue. The published severity is medium, and the bundle does not show confirmed active exploitation.

Executive priority

Treat as a moderate hygiene and trust-risk issue. It is not marked as actively exploited, but outdated GitLab instances can expose users to stored script execution in a collaboration workflow.

Technical view

The CVE describes CWE-79 stored XSS in GitLab Community and Enterprise Edition before 11.1.7, 11.2.x before 11.2.4, and 11.3.x before 11.3.1. CVSS 3.1 is 5.4 with network access, low attack complexity, low privileges required, user interaction required, and changed scope.

Likely exposure

Exposure is limited to GitLab CE/EE deployments still running the affected version ranges and using issue details where users can submit content. Modern deployments should be unaffected if upgraded beyond the fixed releases.

Exploitation context

The source bundle marks CISA KEV as false and provides no cited evidence of active exploitation. The CVSS vector indicates an attacker needs an account-level foothold and a victim interaction, such as viewing affected issue content.

Researcher notes

Evidence is limited to the CVE record and GitLab release reference. The affected versions and CVSS vector are clear, but the bundle does not include proof-of-concept details, exploit telemetry, or named compensating controls beyond upgrading.

Mitigation direction

  • Upgrade GitLab CE/EE to 11.1.7, 11.2.4, 11.3.1, or later.
  • Review the GitLab security release for vendor-stated remediation details.
  • If upgrade timing is constrained, check GitLab guidance for supported compensating controls.
  • Track GitLab release notes for any related security follow-up.

Validation and detection

  • Inventory GitLab CE/EE versions across all managed environments.
  • Confirm no instance remains before 11.1.7, 11.2.4, or 11.3.1 as applicable.
  • Check vulnerability scanner results for CVE-2018-17454 coverage and closure.
  • Prioritize systems where untrusted users can create or edit issue content.
Prepared
Confidence
high
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.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2018-17454 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
5.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
5.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.4Medium
CVSS 3.1 vector shape for CVE-2018-17454Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
n/an/an/aListed
Weakness

CWE details

CWE-79

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