CVE-2021-30130

HIGH
Published Apr 6, 20215y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 6, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-347

Affected Products 3

VendorProductVersionRange
phpseclibphpseclib* <2.0.31
phpseclibphpseclib*≥3.0  –  <3.0.7
debiandebian_linux10.0any

References 5

  • github.com https://github.com/phpseclib/phpseclib/pull/1635
    PatchThird Party Advisory
  • github.com https://github.com/phpseclib/phpseclib/releases/tag/2.0.31
    Release NotesThird Party Advisory
  • github.com https://github.com/phpseclib/phpseclib/releases/tag/3.0.7
    Release NotesThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/11/msg00024.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/11/msg00025.html
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/phpseclib/phpseclib/pull/1635
    PatchThird Party Advisory