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CVE Record

CVE-2026-3354: Wikilookup <= 1.1.5 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Popup Width' Setting

The Wikilookup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Popup Width' setting in all versions up to, and including, 1.1.5. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

MediumCVSS 4.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-3354 is a stored cross-site scripting issue in the Wikilookup WordPress plugin through version 1.1.5. It requires an authenticated Administrator-level user, reducing broad attack likelihood. Impact is mainly risk from compromised or malicious admins causing script execution for other users.

Executive priority

Treat as a moderate, targeted web risk. It is not currently supported as actively exploited, but should be remediated where Wikilookup is installed because admin account compromise could turn this into persistent browser-side execution.

Technical view

The Wikilookup plugin insufficiently sanitizes and escapes the “Popup Width” setting, enabling stored XSS. The source description limits impact to WordPress multisite installations and installations where unfiltered_html is disabled. CVSS is 4.4, with high privileges required and low confidentiality/integrity impact.

Likely exposure

Exposure is limited to WordPress sites using Wikilookup version 1.1.5 or earlier, specifically multisite environments or sites with unfiltered_html disabled. Sites without the plugin are not exposed based on provided sources.

Exploitation context

No source in the bundle indicates active exploitation, and CISA KEV is false. Abuse requires Administrator-level access or higher, so realistic scenarios include compromised admin accounts, malicious insiders, or chained attacks that first gain WordPress admin privileges.

Researcher notes

The bundle cites CWE-79 and CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N. Fix information is not provided in the supplied sources. The affected metadata appears sparse, so validation should rely on plugin presence, version, and the stated environmental conditions.

Mitigation direction

  • Identify WordPress sites running the Wikilookup plugin.
  • Prioritize multisite deployments and sites with unfiltered_html disabled.
  • Check vendor or WordPress plugin guidance for an updated fixed version.
  • Restrict Administrator accounts to trusted users only.
  • Review admin accounts for compromise or unnecessary privileges.

Validation and detection

  • Confirm whether Wikilookup is installed on each WordPress site.
  • Record installed plugin versions and flag 1.1.5 or earlier.
  • Determine whether the site is multisite or has unfiltered_html disabled.
  • Review the Popup Width setting for unexpected script-like content.
  • Check logs for recent changes to Wikilookup settings by admin users.
Prepared
Confidence
medium
Sources
5

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-2026-3354 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/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
4Source 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
4.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N1.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.4Medium
CVSS 3.1 vector shape for CVE-2026-3354Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/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
mooeypooWikilookup0unaffected
Weakness

CWE details

CWE-79

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

CWE-79 · source CWE mapping

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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