CVE-2003-0255

CRITICAL

The key validation code in GnuPG before 1.2.2 does not properly determine the validity of keys with multiple user IDs and assigns the greatest validity of the most valid user ID, which prevents Gnu...

Affects 1 product across 1 vendor.

CVSS 2.010.0
EPSS6.6%
Percentile94th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2003. A critical vulnerability affects Gnu systems (CVE-2003-0255). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2003-GLOBAL-345274-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2003-0255?
This vulnerability was disclosed in 2003. A critical vulnerability affects Gnu systems (CVE-2003-0255). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2003-0255?
CVE-2003-0255 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 6.6%.
Is CVE-2003-0255 actively exploited?
No confirmed active exploitation of CVE-2003-0255 as of 2026-09-25.
How do I remediate CVE-2003-0255?
Priority: MEDIUM. PSIRT: [email protected]
What systems are affected by CVE-2003-0255?
CVE-2003-0255 affects Gnu Privacy Guard.
Vulnerability Details
CVE IDCVE-2003-0255
BSIDBS-2003-GLOBAL-345274-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2003-05-27
Last Modified2026-06-16
ICS Relevance0%
SourceNVD
Official Description

The key validation code in GnuPG before 1.2.2 does not properly determine the validity of keys with multiple user IDs and assigns the greatest validity of the most valid user ID, which prevents GnuPG from warning the encrypting user when a user ID does not have a trusted path.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: The key validation code in GnuPG before 1.2.2 does not properly determine the validity of keys with multiple user IDs and assigns the greatest validity of the most valid user ID, which prevents GnuPG from warning the encrypting user when a user ID does not have a trusted path. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Gnu Privacy Guard ≤ 1.2.1
Remediation

No official vendor advisory link on record. See the CVE record →

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 8551 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash364af886b4083ea93f2654c1b273dfc96482790c8b08c4e9788c8884d7c07725b21a9c246e126aba3d631f357948539c9d7703dd1f185c4d45da802dc7f8252f
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