Pidgin CVE-2019-25544

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EUVD

EUVD-2019-19837 MEDIUM

Reliance on Untrusted Inputs in a Security Decision (CWE-807)

2026-03-21 VulnCheck

GHSA-hvgh-8gm9-9vq2

Denial Of Service Pidgin

6.9

CVSS 4.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-807 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V2 - Validation and Business Logic Trusted input validation
Impact	CVSS score of 6.9 (MEDIUM). Attack characteristics: local attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.01%.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 21, 2026

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. Rated medium severity (CVSS 6.9), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Earlier versions of this analysis (1)

v1 Mar 21, 2026 - 13:00 CVSS 6.2

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected VersionsENISA

Pidgin 2.13.0

Affected Packages

euvd pidgin no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Technical ContextAI · show details

This vulnerability is classified under CWE-807. 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 include: Pidgin.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.9 MEDIUM

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

SUSE 6.2 MEDIUM

AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Red Hat 6.2 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

None

Vulnerable system: Integrity

None

Vulnerable system: Availability

High

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

5

CVSS changed

Apr 16, 2026 - 17:52 NVD

6.2 (MEDIUM) 6.9 (MEDIUM)

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

PoC Detected

Mar 23, 2026 - 14:31 vuln.today

Public exploit code

CVE Published

Mar 21, 2026 - 12:46 nvd

MEDIUM 6.2

CVE Published

Mar 21, 2026 - 12:46 cve.org

MEDIUM 6.9

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

Organizations using Pidgin 2.13.0 should be aware of moderate risk from CVE-2019-25544 rated CVSS 6.2. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low

Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score

0.0%

Top 97% exploitable

Exploit

POC

Public exploit code exists

Data Quality

8 sources

Confidence: High

EUVD

CVE.org

EPSS

Vulnrichment Vendor

Exploit-DB

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision

Defer

Exploitation

Poc

System Exposure· derived

Small

Automatable

No

Human Impact

Low

Technical Impact

Partial

Priority Score

54

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +34

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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CVE-2014-1761 HIGH POC

CVE-2015-5122 CRITICAL POC

CVE-2011-0609 HIGH POC

Vendor StatusVendor

SUSE

Severity: Medium

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7	Fixed
SUSE Linux Enterprise Server 15 SP7	Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP7	Fixed
SUSE Linux Enterprise Workstation Extension 15 SP7	Fixed

References

Advisories & patches

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2019-25544 ADVISORY https://vuldb.com/?id.352335 REF https://pidgin.im/ REF https://www.vulncheck.com/advisories/pidgin-denial-of-service-via-malformed-username

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