What is CVE-2025-65858?

CVE-2025-65858 is a low-severity vulnerability in Janeczku Calibre-Web, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2025-12-02.

How severe is CVE-2025-65858?

Low severity. CVSS v3 base score is 3.5 out of 10.

Is CVE-2025-65858 known to be exploited?

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

XSS in Janeczku Calibre-Web

CVE-2025-65858

A Stored Cross-Site Scripting (XSS) vulnerability in Calibre-Web v0.6.25 allows attackers to inject malicious JavaScript into the 'username' field during user creation. The payload is stored unsanitized and later executed when the /ajax/listusers endpoint is accessed.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (7.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N.

Affected products

Janeczku Calibre-web — versions 0.6.25
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

KhanhDuy155/calibre-web-CVE-2025-65858

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-65858?: CVE-2025-65858 is a low-severity vulnerability in Janeczku Calibre-Web, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2025-12-02.
How severe is CVE-2025-65858?: Low severity. CVSS v3 base score is 3.5 out of 10.
Is CVE-2025-65858 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.