CVE-2023-4308

User Submitted Posts <= 20230809 - Unauthenticated Stored Cross-Site Scripting via 'user-submitted-content'

MEDIUM
5.4
CVSS Score
Published: August 15, 2023 at 07:32 AM UTC
Updated: June 17, 2026 at 06:37 AM UTC
2 products affected across 2 vendorsUser Submitted PostsUser Submitted Posts

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

The User Submitted Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘user-submitted-content’ parameter in versions up to, and including, 20230809 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 20230811
Affected range stops below 20230811, so it looks safe — our inference, not a vendor statement
v ≤ 20230809

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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