CVE-2017-20106Public exploit

Server-side request forgery via unchecked upload URL

Published Jun 28, 2022 · Updated Apr 15, 2025

Server-side request forgery in Khoros Lithium Forum 2017 Q1 allows local users to trigger server-side requests via upload_url. The Compose Message Handler processes the attacker-controlled upload_url, but public sources do not disclose the exact request operation or failed validation. Low-privilege local access is required; successful use can make the service contact attacker-chosen resources and affect data confidentiality and integrity.

CVSS severity4.4
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Khoros Lithium Forum 2017 Q1 allows local users to trigger server-side requests via upload_url. The Compose Message Handler processes the attacker-controlled upload_url, but public sources do not disclose the exact request operation or failed validation. Low-privilege local access is required; successful use can make the service contact attacker-chosen resources and affect data confidentiality and integrity.

The record

CVE
CVE-2017-20106
Published
Jun 28, 2022
Updated
Apr 15, 2025
Vendor
Khoros
Product
Lithium Forum
Classifications
CWE-918, CAPEC-664
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=2017 Q1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Khoros · Lithium Forumversion=2017 Q1

Published CVSS scores

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
3.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery

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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