Denial of Service Vulnerability in Pidgin by Pidgin Developers
CVE-2019-25544

6.9MEDIUM

Key Information:

Vendor

Pidgin

Status
Pidgin
Vendor
CVE Published:
21 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25544?

Pidgin 2.13.0 is susceptible to a denial of service issue where an attacker can create a local account using an excessively long username. By inputting a buffer of 1000 characters in the username field, attackers can trigger a crash when attempting to join a chat, rendering the application inoperable. This vulnerability poses significant risks for users as it allows for malicious exploits that disrupt services.

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Deploy the Patch

Affected Version(s)

Pidgin 2.13.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25544 - Proof of Concept

References

https://www.exploit-db.com/exploits/46930
exploit
https://pidgin.im/
product
https://www.vulncheck.com/advisories/pidgin-denial-of-ser...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Alejandra Sánchez
JSON
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