CVE-2025-15367 - Vulnerability Details - OpenCVE

The poplib module, when passed a user-controlled command, can have
additional commands injected using newlines. Mitigation rejects commands
containing control characters.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/python/cpython/commit/b234a2b67539f787e191d2ef19a7cbdce32874e7
https://github.com/python/cpython/issues/143923
https://github.com/python/cpython/pull/143924
https://mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/

History

Tue, 20 Jan 2026 22:45:00 +0000

Type	Values Removed	Values Added
References		https://github.com/python/cpython/commit/b234a2b67539f787e191d2ef19a7cbdce32874e7

Tue, 20 Jan 2026 22:00:00 +0000

Type	Values Removed	Values Added
Description		The poplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.
Title		POP3 command injection in user-controlled commands
Weaknesses		CWE-77
References		https://github.com/python/cpython/issues/143923 https://github.com/python/cpython/pull/143924 https://mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/
Metrics		cvssV4_0 `{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: PSF

Published: 2026-01-20T21:47:09.885Z

Updated: 2026-01-20T22:27:52.184Z

Reserved: 2025-12-30T16:06:42.288Z

Link: CVE-2025-15367

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-01-20T22:15:51.153

Modified: 2026-01-20T23:16:05.433

Link: CVE-2025-15367

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-77

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-15367", "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22", "state": "PUBLISHED", "assignerShortName": "PSF", "dateReserved": "2025-12-30T16:06:42.288Z", "datePublished": "2026-01-20T21:47:09.885Z", "dateUpdated": "2026-01-20T22:27:52.184Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["poplib"], "product": "CPython", "repo": "https://github.com/python/cpython", "vendor": "Python Software Foundation", "versions": [{"lessThan": "3.15.0", "status": "affected", "version": "0", "versionType": "python"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "The poplib module, when passed a user-controlled command, can have\nadditional commands injected using newlines. Mitigation rejects commands\ncontaining control characters."}], "value": "The poplib module, when passed a user-controlled command, can have\nadditional commands injected using newlines. Mitigation rejects commands\ncontaining control characters."}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 5.9, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-77", "description": "CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "28c92f92-d60d-412d-b760-e73465c3df22", "shortName": "PSF", "dateUpdated": "2026-01-20T22:27:52.184Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/python/cpython/pull/143924"}, {"tags": ["issue-tracking"], "url": "https://github.com/python/cpython/issues/143923"}, {"tags": ["vendor-advisory"], "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/"}, {"tags": ["patch"], "url": "https://github.com/python/cpython/commit/b234a2b67539f787e191d2ef19a7cbdce32874e7"}], "source": {"discovery": "UNKNOWN"}, "title": "POP3 command injection in user-controlled commands", "x_generator": {"engine": "Vulnogram 0.5.0"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "The poplib module, when passed a user-controlled command, can have\nadditional commands injected using newlines. Mitigation rejects commands\ncontaining control characters."}], "id": "CVE-2025-15367", "lastModified": "2026-01-20T23:16:05.433", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@python.org", "type": "Secondary"}]}, "published": "2026-01-20T22:15:51.153", "references": [{"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/b234a2b67539f787e191d2ef19a7cbdce32874e7"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/issues/143923"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/143924"}, {"source": "cna@python.org", "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/"}], "sourceIdentifier": "cna@python.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "cna@python.org", "type": "Secondary"}]}