CVE-2025-6998 HIGH

CVE-2025-6998: Calibre Web 0.6.24 & Autocaliweb 0.7.0 - ReDoS

Vendor Calibre Web
Product Calibre Web
Weakness CWE-1333
Published July 24, 2025
Last update July 25, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. This issue affects Calibre Web: 0.6.24 (Nicolette); Autocaliweb: from 0.7.0 before 0.7.1.

Key dates

02Disclosure timeline

July 24, 2025 CVE published
July 25, 2025 Record updated