CVE-2025-66824Public exploitNetwork attack vector

Account takeover via stored meeting-location script

Published Dec 30, 2025 · Updated Dec 30, 2025

Stored XSS in TrueConf Server 5.5.2.10813 allows remote authenticated users to take over accounts through a meeting location. The meeting_room parameter accepts unsanitized input in Create/Edit Conference and stores it for unsafe rendering on the Conference Info page. A conference creator must plant the payload and another user must view that page; the script can steal API tokens and user IDs from localStorage.

CVSS severity8.7
High
EPSS probability0.30%
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 TrueConf Server 5.5.2.10813 allows remote authenticated users to take over accounts through a meeting location. The meeting_room parameter accepts unsanitized input in Create/Edit Conference and stores it for unsafe rendering on the Conference Info page. A conference creator must plant the payload and another user must view that page; the script can steal API tokens and user IDs from localStorage.

The record

CVE
CVE-2025-66824
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
8.7NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1528Steal Application Access Token

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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