CVE-2019-25544

MEDIUM

Pidgin 2.13.0 Denial of Service via Malformed Username

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-25544. PoCs published by Alejandra Sánchez.

AI-analyzed exploit summary This PoC exploits a buffer overflow vulnerability in Pidgin 2.13.0 by writing a large buffer of 'A' characters to a file, which when used as a username in Pidgin's account management, triggers a denial of service (DoS) crash.

Description

Pidgin 2.13.0 contains a denial of service vulnerability that allows local attackers to crash the application by providing an excessively long username string during account creation. Attackers can input a buffer of 1000 characters in the username field and trigger a crash when joining a chat, causing the application to become unavailable.

Exploits (1)

exploitdb WORKING POC
by Alejandra Sánchez · pythondoswindows
https://www.exploit-db.com/exploits/46930

This PoC exploits a buffer overflow vulnerability in Pidgin 2.13.0 by writing a large buffer of 'A' characters to a file, which when used as a username in Pidgin's account management, triggers a denial of service (DoS) crash.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Pidgin 2.13.0
No auth needed
Prerequisites: Python to generate the payload file · User interaction to input the malicious username in Pidgin
devstral-2 · analyzed Mar 21, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit exploit
ExploitDB-46930
https://www.exploit-db.com/exploits/46930
Product product
Official Product Homepage
https://pidgin.im/
Third Party Advisory third-party-advisory
VulnCheck Advisory: Pidgin 2.13.0 Denial of Service via Malformed Username
https://www.vulncheck.com/advisories/pidgin-denial-of-service-via-malformed-username

Scores

CVSS v3 6.2
EPSS 0.0019
EPSS Percentile 8.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-807
Status published
Products (2)
pidgin/pidgin 2.13.0
Pidgin/Pidgin 2.13.0
Published Mar 21, 2026
Tracked Since Mar 21, 2026