Backup and Staging by WP Time Capsule <= 1.21.15 — Authentication Bypass
CVE-2020-8771Published · Updated Action summary
Affected: <1.21.16Update to 1.21.16 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Backup and Staging by WP Time Capsule wp-time-capsule
- Affected< 1.21.16
- Patched in1.21.16
Update to 1.21.16 or newer.
You are affected if you run < 1.21.16. Version 1.21.16 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Backup and Staging by WP Time Capsule.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 1.21.16, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Backup and Staging by WP Time Capsule to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to WebARX Security.
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. CVE-2020-37255 is a duplicate of this.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Backup and Staging by WP Time Capsule
All 10| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Missing Authorization ≤1.22.27Update to 1.22.28 | CVE-2026-107237 | |
| Medium6.5 | Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via download_recent_decrypted_file_wptc Function ≤1.22.26Update to 1.22.27 | CVE-2026-8996 | |
| Medium5.3 | Missing Authorization ≤1.22.25Update to 1.22.26 | CVE-2026-42760 | |
| Medium6.1 | Reflected Cross-Site Scripting ≤1.22.23Update to 1.22.24 | CVE-2025-47477 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload ≤1.22.21Update to 1.22.22 | CVE-2024-8856 |
- Medium4.3Missing Authorization
≤1.22.27Update to 1.22.28
- Medium6.5Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via download_recent_decrypted_file_wptc Function
≤1.22.26Update to 1.22.27
- Medium5.3Missing Authorization
≤1.22.25Update to 1.22.26
- Medium6.1Reflected Cross-Site Scripting
≤1.22.23Update to 1.22.24
- Critical9.8Unauthenticated Arbitrary File Upload
≤1.22.21Update to 1.22.22
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.