CVE-2022-27894Network attack vector

Account impersonation via unenforced upload execution restrictions

Published Nov 4, 2022 · Updated May 2, 2025

Stored XSS in Palantir Foundry Blobster 3.207.0 through 3.227.0 allows remote authenticated users to impersonate others via uploaded files. Compass Blobster serves uploaded HTML and JavaScript while its content security policy fails to apply expected execution restrictions, causing the HTML to load the script in a visitor's Foundry context. Exploitation requires Foundry access to upload both files and a second user to click the supplied link; the script can perform Foundry actions or capture that user's session token.

CVSS severity4.8
Medium
EPSS probability0.35%
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 Palantir Foundry Blobster 3.207.0 through 3.227.0 allows remote authenticated users to impersonate others via uploaded files. Compass Blobster serves uploaded HTML and JavaScript while its content security policy fails to apply expected execution restrictions, causing the HTML to load the script in a visitor's Foundry context. Exploitation requires Foundry access to upload both files and a second user to click the supplied link; the script can perform Foundry actions or capture that user's session token.

The record

CVE
CVE-2022-27894
Published
Nov 4, 2022
Updated
May 2, 2025
Vendor
Palantir Technologies
Product
Foundry Blobster Service
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 4, 2022CVE publishedPublication date reported by the CVE source.
  2. May 2, 2025Record 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=next of 3.207.0 <unspecified
  2. Affected versionversion=unspecified <3.227.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Palantir Technologies · Foundry Blobster Serviceversion=next of 3.207.0 <unspecified; version=unspecified <3.227.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.8Palantir TechnologiesCVSS: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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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