Compress Then Upload < 1.0.5 - Admin+ Arbitrary File Upload
Priority MEDIUM 51CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-434.
Summary
The Compress & Upload WordPress plugin before 1.0.5 does not properly validate uploaded files, allowing high privilege users such as admin to upload arbitrary files on the server even when they should not be allowed to (for example in multisite setup)
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed Compress & Upload (Unknown): 1.0.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Compress & Upload | before 1.0.5 | 1.0.5 | Patch available | CNA |
- Compress & Upload VendorUnknown Affected before 1.0.5 Fixed in 1.0.5 Patch available CNA
Remediation
- Fix · CNA Compress & Upload (Unknown) Fixed in 1.0.5
Timeline
- 2026-10-02 Threatist record created from CVE-2025-8889
- 2026-10-03 Alias added: GHSA-34r3-h75p-74mh
References
Sources
- CVE-2025-8889 · CVE Program
- CVE-2025-8889 · NVD
- FIRST EPSS
- GHSA-34r3-h75p-74mh · GitHub Advisory Database · CC BY 4.0
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