CVE-2025-6998

Calibre Web 0.6.24 & Autocaliweb 0.7.0 - ReDoS

Published Jul 24, 2025 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-22540 Calibre Web and Autocaliweb have a ReDoS vulnerability
Github GHSA Github GHSA GHSA-2g7m-ph9x-7q7m Calibre Web and Autocaliweb have a ReDoS vulnerability
History
Type Values Removed Values Added
First Time appeared Janeczku
Janeczku calibre-web
Vendors & Products Janeczku
Janeczku calibre-web
Type Values Removed Values Added
Description 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; Autocaliweb: from 0.7.0 before 0.7.1. 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.
Type Values Removed Values Added
Description ReDoS in strip_whitespaces() function in cps/string_helper.py in janeczku Calibre Web 0.6.24 (Nicolette) allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. ReDoS in strip_whitespaces() function in cps/string_helper.py in gelbphoenix Autocaliweb 0.7.0 on allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. 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; Autocaliweb: from 0.7.0 before 0.7.1.
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description ReDoS in strip_whitespaces() function in cps/string_helper.py in janeczku Calibre Web 0.6.24 (Nicolette) allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. ReDoS in strip_whitespaces() function in cps/string_helper.py in gelbphoenix Autocaliweb 0.7.0 on allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login.
Title Calibre Web 0.6.24 & Autocaliweb 0.7.0 - ReDoS
Weaknesses CWE-1333
References
Metrics cvssV4_0

{'score': 8.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Fluid Attacks
Published
Updated
Jul 25, 2025, 1:17 PM
Reserved
Jul 1, 2025, 11:26 PM
Status
Deferred
Published
Jul 24, 2025, 8:15 PM
Modified
Jun 17, 2026, 10:03 AM