CVE intelligence and bounded remediation

CVE-2020-8510 — An issue was discovered in phpABook 0.9 Intermediate

Critical CVSS 9.8

An issue was discovered in phpABook 0.9 Intermediate. On the login page, if one sets a userInfo cookie with the value of admin+1+en (user+perms+lang), one can login as any user without a password.

Severity
Critical
CVSS
9.8 (3.1)
Published
2020-02-03
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-287

Affected products

  • phpabook_project / phpabook / 0.9

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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