CVE-2025-43926Network attack vector

Permission elevation via arbitrary preference-key injection

Published May 8, 2025 · Updated May 12, 2025

Stored XSS in Znuny LTS 6.0, 6.5.1 through 6.5.14, and 7.0.1 through 7.1.6 allows remote authenticated users to elevate permissions. AgentPreferences UpdateAJAX accepts arbitrary preference keys, and GetUserData passes the complete attacker-controlled key-value map to downstream functions without restricting the keys. A valid agent session is required, and downstream use of the injected preferences changes permissions or other settings; no service interruption is reported.

CVSS severity6.1
Medium
EPSS probability0.23%
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 Znuny LTS 6.0, 6.5.1 through 6.5.14, and 7.0.1 through 7.1.6 allows remote authenticated users to elevate permissions. AgentPreferences UpdateAJAX accepts arbitrary preference keys, and GetUserData passes the complete attacker-controlled key-value map to downstream functions without restricting the keys. A valid agent session is required, and downstream use of the injected preferences changes permissions or other settings; no service interruption is reported.

The record

CVE
CVE-2025-43926
Published
May 8, 2025
Updated
May 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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

6.1CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/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.

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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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1068Exploitation for Privilege Escalation

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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