What’s Vulnerable › Vulnerabilities

CVE-2019-25544: Pidgin 2.13.0 Denial of Service via Malformed Username

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-21 · updated 2026-06-17
• Weakness: CWE-807

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.

Affected products

• Pidgin: 2.13.0

References

• https://pidgin.im/
• https://www.exploit-db.com/exploits/46930
• https://www.vulncheck.com/advisories/pidgin-denial-of-service-via-malformed-username

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