How severe is CVE-2023-45603?

CVE-2023-45603 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-45603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-45603?

CVE-2023-45603 affects Plugin-planet User Submitted Posts. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-45603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-45603 published?

CVE-2023-45603 was published on 2023-12-20 and last updated on 2026-06-17.

CVE-2023-45603

CVE-2023-45603 is a critical-severity vulnerability in Plugin-planet User Submitted Posts with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Plugin-planet User Submitted Posts
Published: 2023-12-20
Last modified: 2026-06-17

Description

Unrestricted Upload of File with Dangerous Type vulnerability in Jeff Starr User Submitted Posts – Enable Users to Submit Posts from the Front End.This issue affects User Submitted Posts – Enable Users to Submit Posts from the Front End: from n/a through 20230902.

Frequently asked questions

What is CVE-2023-45603?: Unrestricted Upload of File with Dangerous Type vulnerability in Jeff Starr User Submitted Posts – Enable Users to Submit Posts from the Front End.This issue affects User Submitted Posts – Enable Users to Submit Posts from the Front End: from n/a through 20230902.
How severe is CVE-2023-45603?: CVE-2023-45603 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-45603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-45603?: CVE-2023-45603 affects Plugin-planet User Submitted Posts. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-45603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-45603 published?: CVE-2023-45603 was published on 2023-12-20 and last updated on 2026-06-17.

References

https://patchstack.com/database/vulnerability/user-submitted-posts/wordpress-user-submitted-posts-plugin-20230902-unauthenticated-arbitrary-file-upload-vulnerability?_s_id=cve

Affected products (1)

cpe:2.3:a:plugin-planet:user_submitted_posts:*:*:*:*:*:wordpress:*:*

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