What is CVE-2023-5873?

CVE-2023-5873 is a medium-severity vulnerability in Pimcore, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-10-31.

How severe is CVE-2023-5873?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2023-5873 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Pimcore

CVE-2023-5873

Cross-site Scripting (XSS) - Stored in GitHub repository pimcore/pimcore prior to 11.1.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-10-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.5th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Pimcore
Pimcore Pimcore/pimcore — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

tht1997/tht1997

References

huntr.com/bounties/701cfc30-22a1-4c4b-9b2f-885c77c290ce (Exploit, Patch, Third Party Advisory)
github.com/pimcore/pimcore/commit/757375677dc83a44c6c22f26d97452cc5cda5d7c (Patch)

Frequently asked questions

What is CVE-2023-5873?: CVE-2023-5873 is a medium-severity vulnerability in Pimcore, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-10-31.
How severe is CVE-2023-5873?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-5873 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.