CVE-2017-20120Public exploitNetwork attack vector

Service shutdown via unvalidated cross-origin request

Published Jun 29, 2022 · Updated Apr 15, 2025

Cross-site request forgery in TrueConf Server 4.3.7 allows remote attackers to stop the service through an administrator's browser. The /admin/service/stop/ endpoint accepts a cross-origin POST request without verifying that the logged-in administrator intended the action. Exploitation requires an administrator with an active session to visit attacker-controlled content, after which the server service is stopped.

CVSS severity4.3
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in TrueConf Server 4.3.7 allows remote attackers to stop the service through an administrator's browser. The /admin/service/stop/ endpoint accepts a cross-origin POST request without verifying that the logged-in administrator intended the action. Exploitation requires an administrator with an active session to visit attacker-controlled content, after which the server service is stopped.

The record

CVE
CVE-2017-20120
Published
Jun 29, 2022
Updated
Apr 15, 2025
Vendor
TrueConf
Product
TrueConf Server
Classifications
CWE-352, CAPEC-62, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 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=4.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TrueConf · TrueConf Serverversion=4.3.7

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204.001Malicious Link

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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