What is CVE-2023-5904?

CVE-2023-5904 is a medium-severity vulnerability in Pkp Pkp/pkp-Lib, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-11-07.

How severe is CVE-2023-5904?

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

XSS in Pkp Pkp/pkp-Lib

CVE-2023-5904

Cross-site Scripting (XSS) - Stored in GitHub repository pkp/pkp-lib prior to 3.3.0-16.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-11-07 · 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: 0.004 (36.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Pkp Pkp/pkp-Lib — versions unspecified
Sfu Pkp Web Application Library

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

huntr.com/bounties/4df6bce6-dbe3-48e4-9830-e95cdc5138b6 (Exploit, Third Party Advisory)
github.com/pkp/pkp-lib/commit/aa5c6acb634fbe460765facb2dc26df4b0d7424b (Patch)

Frequently asked questions

What is CVE-2023-5904?: CVE-2023-5904 is a medium-severity vulnerability in Pkp Pkp/pkp-Lib, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-11-07.
How severe is CVE-2023-5904?: Medium severity. CVSS v3 base score is 5.4 out of 10.