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Public proof of conceptFix available

CVE-2020-8771

A public proof of concept exists; no exploitation attested.

  • Published2020-02-06
  • Fixed in1.21.16
  • WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The Time Capsule plugin before 1.21.16 for WordPress has an authentication bypass. Any request containing IWP_JSON_PREFIX causes the client to be logged in as the first account on the list of administrator accounts.

Timeline

dates in UTC
  1. 2020-02-0617:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-8771?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-8771?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Wptimecapsule wp time capsule
BranchAffectedFixed in
1.21< 1.21.161.21.16

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Wptimecapsule wp time capsule to 1.21.16

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • NVDweakness (CWE)CWE-287read 2026-10-23
  • FIRST EPSSEPSS score46.5 %read 2026-11-03
  • ProjectDiscoverydetectionread 2026-11-03

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2020-02-06
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2020-8771?

The Time Capsule plugin before 1.21.16 for WordPress has an authentication bypass. Any request containing IWP_JSON_PREFIX causes the client to be logged in as the first account on the list of administrator accounts.

Is CVE-2020-8771 actively exploited?

Active exploitation of CVE-2020-8771 has not been confirmed. Its EPSS score was 46.5% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8771?

CVE-2020-8771 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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