CVE-2023-26961Public exploitNetwork attack vector

Stored XSS via unvalidated media type field

Published Aug 8, 2023 · Updated Jul 9, 2026

Stored XSS in Alteryx Server 2022.1.1.42590 allows remote authenticated users to execute script in another user's browser. The Gallery media API accepts the JSON type field in a PUT /gallery/api/media request without file-type validation and stores it for insertion into the media filter. Administrator access is required to plant the payload, and script executes only when another user opens the media section and selects the injected filter entry.

CVSS severity4.8
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Alteryx Server 2022.1.1.42590 allows remote authenticated users to execute script in another user's browser. The Gallery media API accepts the JSON type field in a PUT /gallery/api/media request without file-type validation and stores it for insertion into the media filter. Administrator access is required to plant the payload, and script executes only when another user opens the media section and selects the injected filter entry.

The record

CVE
CVE-2023-26961
Published
Aug 8, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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