The Page Builder: KingComposer plugin for WordPress is vulnerable to Arbitrary File Uploads in versions up to, and including, 2.9.3 via the 'process_bulk_action' function in the 'kingcomposer/includes/kc.extensions.php' file. This makes it possible for authenticated users with author level permissions and above to upload arbitrary files onto the server which can be used to execute code on the server.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesLow
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | PoC | E: U→P | 5.2 → 6.8 |
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 5.2 → 5.2 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 5.2 |
Affected Software
| Vendor | Product | Version |
|---|
| king-theme | page_builder_king_composer | ≤ 2.9.3 |
| kingthemes | Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme | ≤ 2.9.3 |
Published: 2023-06-07
