CVE-2026-57440Public exploitNetwork attack vector

Stored XSS via unsanitized iframe source URL

Published Sep 24, 2026 · Updated Sep 24, 2026

Stored XSS in Star Citizen Wiki EmbedVideo before 4.1.0 allows remote attackers to execute JavaScript via a malformed video URL. With $wgEmbedVideoRequireConsent disabled, getUrl() supplies an unsanitized URL to an iframe src attribute, where a double quote escapes the attribute and injects an event handler. The nondefault setting and permission to edit a page are required; injected code executes automatically in the wiki origin for every visitor to the page.

CVSS severity7.5
High
EPSS probability0.26%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Star Citizen Wiki EmbedVideo before 4.1.0 allows remote attackers to execute JavaScript via a malformed video URL. With $wgEmbedVideoRequireConsent disabled, getUrl() supplies an unsanitized URL to an iframe src attribute, where a double quote escapes the attribute and injects an event handler. The nondefault setting and permission to edit a page are required; injected code executes automatically in the wiki origin for every visitor to the page.

The record

CVE
CVE-2026-57440
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
Star Citizen Wiki
Product
EmbedVideo
Classifications
CWE-80, CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Star Citizen Wiki · EmbedVideoversion=< 4.1.0

Published CVSS scores

7.5GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

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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