CVE-2026-88826Network attack vector

Unauthenticated stored XSS via unchecked gallery data

Published Oct 11, 2026 · Updated Oct 11, 2026

Stored XSS in SmugMug Embed 3.13 and earlier allows remote attackers to execute scripts via gallery data in administrator settings. The gallery-storage AJAX action lacks authorization and CSRF checks, and stored data reaches the settings screen without sanitization or escaping. Script execution requires an administrator to view that screen and occurs in the administrator's browser, not directly on the server.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
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 SmugMug Embed 3.13 and earlier allows remote attackers to execute scripts via gallery data in administrator settings. The gallery-storage AJAX action lacks authorization and CSRF checks, and stored data reaches the settings screen without sanitization or escaping. Script execution requires an administrator to view that screen and occurs in the administrator's browser, not directly on the server.

The record

CVE
CVE-2026-88826
Published
Oct 11, 2026
Updated
Oct 11, 2026
Vendor
Tracy Wicklund
Product
SmugMug Embed
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 11, 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=0 <=3.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tracy Wicklund · SmugMug Embedversion=0 <=3.13

Published CVSS scores

No CVSS assessment is available in this record.

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 exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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