CVE-2025-49091Public exploitNetwork attack vector

Remote code execution via preserved URL arguments

Published Jun 11, 2025 · Updated Jun 18, 2025

Remote code execution in KDE Konsole before 25.04.2 allows remote attackers to run code through a crafted external-scheme URL. When KTelnetService passes an ssh, telnet, or rlogin URL for a missing client binary, Konsole falls back to /bin/bash without clearing the URL-derived argument. Exploitation requires a browser user to approve the external-scheme prompt, and the supplied script runs with that user's privileges.

CVSS severity8.2
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in KDE Konsole before 25.04.2 allows remote attackers to run code through a crafted external-scheme URL. When KTelnetService passes an ssh, telnet, or rlogin URL for a missing client binary, Konsole falls back to /bin/bash without clearing the URL-derived argument. Exploitation requires a browser user to approve the external-scheme prompt, and the supplied script runs with that user's privileges.

The record

CVE
CVE-2025-49091
Published
Jun 11, 2025
Updated
Jun 18, 2025
Vendor
KDE
Product
Konsole
Classifications
CWE-670, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 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=0 <25.04.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

KDE · Konsoleversion=0 <25.04.2

Published CVSS scores

8.2UbuntuCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L
8.3OracleCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
8.2National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-670Always-Incorrect Control Flow Implementation
T1203Exploitation for Client Execution

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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