Vulnerability Report

CVE-1999-1481

Title: Squid external auth newline allows access control bypass

Other

Proof Of Concept

PoC Available for CVE-1999-1481

CWE Category NVD-CWE-noinfo

Published Date Dec 31, 1999

Modified Date Jun 16, 2026

Exploit Status Available

Score 5.0 CVSS v2.0

Exploit Probability (EPSS)

3.57%

Vulnerability Summary

CVE-1999-1481: Squid 2.2.STABLE5 and below, when using external authentication, allows attackers to bypass access controls via a newline in the user/password pair.

Impacted Vendors

national_science_foundation 1

squid 1

Reference Links

http://www.securityfocus.com/archive/1/33295 http://www.securityfocus.com/bid/741 http://www.squid-cache.org/Versions/v2/2.2/bugs/ https://exchange.xforce.ibmcloud.com/vulnerabilities/3433 http://www.securityfocus.com/archive/1/33295 http://www.securityfocus.com/bid/741 http://www.squid-cache.org/Versions/v2/2.2/bugs/ https://exchange.xforce.ibmcloud.com/vulnerabilities/3433

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

5.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-1999-1481 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/19567

View Code

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 03, 2025 MODIFIED

Vulnerability data or affected products updated.

December 31, 1999 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected Stack

No specific products linked.