CVE-2024-8856
CriticalExploitedPublic exploitBackup and Staging by WP Time Capsule <= 1.22.21 - Unauthenticated Arbitrary File Upload
Published Nov 18, 2024 · Updated Apr 8, 2026 · Also known as TR-24-1857, fdc2de78-5601-461f-b2f0-c80b592ccb1b
Key Facts
Patch immediately- CVE-2024-8856 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Backup and Staging by WP Time Capsule (Revmakx), wp-time-capsule (wordpress-plugin).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Mar 19, 2025. Public exploit code is available.
- EPSS estimates a 94% probability of exploitation in the next 30 days.
- Fixed versions are available, including Backup and Staging by WP Time Capsule 1.22.22, wp-time-capsule 1.22.22.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
94%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2024-8856 brief as a PDF
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Description
The Backup and Staging by WP Time Capsule plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the the UploadHandler.php file and no direct file access prevention in all versions up to, and including, 1.22.21. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Mar 19, 2025 | n/a | Not reported |
| CIRCL KEV | Jun 21, 2025 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Backup and Staging by WP Time CapsuleRevmakx | See advisory | 1.22.22 |
| wp-time-capsulewordpress-plugin | See advisory | 1.22.22 |
Patched Releases
Backup and Staging by WP Time Capsule
1.22.22
wp-time-capsule
1.22.22
Timeline
Publicly disclosed
Nov 18, 2024
Added to Industry KEV feed
Mar 19, 2025
Added to CIRCL KEV
Jun 21, 2025
Last updated
Apr 8, 2026
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2024-8856
- advisoryhttps://plugins.trac.wordpress.org/browser/wp-time-capsule/trunk/wp-tcapsule-bridge/upload/php/UploadHandler.php
- advisoryhttps://plugins.trac.wordpress.org/changeset/3188325/
- advisoryhttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3153289%40wp-time-capsule&new=3153289%40wp-time-capsule&sfp_email=&sfph_mail=
- advisoryUSOM advisory
FAQ
Common Questions.
The Backup and Staging by WP Time Capsule plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the the UploadHandler.php file and no direct file access prevention in all versions up to, and including, 1.22.21.
Affected: Backup and Staging by WP Time Capsule (Revmakx); wp-time-capsule (wordpress-plugin). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Mar 19, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Backup and Staging by WP Time Capsule 1.22.22, wp-time-capsule 1.22.22.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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