CVE-2017-20117Public exploitNetwork attack vector

Authenticated browser script execution via unsanitized group URL

Published Jun 29, 2022 · Updated Apr 15, 2025

DOM XSS in TrueConf Server 4.3.7 allows remote authenticated users to execute script in another user's browser via /admin/group. The page incorporates attacker-controlled text from the URL into the DOM without sanitizing it before browser interpretation. A logged-in administrator must open a crafted link, after which the script runs in the TrueConf origin and can read or alter session-visible data.

CVSS severity5.4
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM XSS in TrueConf Server 4.3.7 allows remote authenticated users to execute script in another user's browser via /admin/group. The page incorporates attacker-controlled text from the URL into the DOM without sanitizing it before browser interpretation. A logged-in administrator must open a crafted link, after which the script runs in the TrueConf origin and can read or alter session-visible data.

The record

CVE
CVE-2017-20117
Published
Jun 29, 2022
Updated
Apr 15, 2025
Vendor
TrueConf
Product
TrueConf Server
Classifications
CWE-79, CWE-80
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

TrueConf · TrueConf Serverversion=4.3.7

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/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.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

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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