What is CVE-2024-39123?

CVE-2024-39123 is a medium-severity vulnerability in Janeczku Calibre-Web, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2024-07-19.

How severe is CVE-2024-39123?

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

Is CVE-2024-39123 known to be exploited?

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

XSS in Janeczku Calibre-Web

CVE-2024-39123

In janeczku Calibre-Web 0.6.0 to 0.6.21, the edit_book_comments function is vulnerable to Cross Site Scripting (XSS) due to improper sanitization performed by the clean_string function. The vulnerability arises from the way the clean_string function handles HTML sanitization.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2024-07-19 · 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: 0.231 (97.7th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.229 · newest: 0.231 · change: +0.002

Affected products

Janeczku Calibre-Web

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/pentesttoolscom/vulnerability-research/tree/master/CVE-2024-39123 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-39123?: CVE-2024-39123 is a medium-severity vulnerability in Janeczku Calibre-Web, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2024-07-19.
How severe is CVE-2024-39123?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2024-39123 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.