CVE-2019-25544

Pidgin 2.13.0 Denial of Service via Malformed Username

CVSS 6.9 MEDIUMEPSS 0.2%CWE-807

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.2%KEV nãoPoC —Patch —

Lifecycle

21 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

Pidgin · Pidgin

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References

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