CVE-2025-6998
Calibre Web and Autocaliweb ReDoS Vulnerability in Login Function
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.
INFO
Published Date :
July 24, 2025, 8:15 p.m.
Last Modified :
July 25, 2025, 3:29 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | [email protected] |
Public PoC/Exploit Available at Github
CVE-2025-6998 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-6998.
| URL | Resource |
|---|---|
| https://fluidattacks.com/advisories/megadeth | |
| https://github.com/gelbphoenix/autocaliweb | |
| https://github.com/janeczku/calibre-web |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-6998 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-6998
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Exploit for the redos for CalibreWeb v0.6.24
Python
None
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-6998 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-6998 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 25, 2025
Action Type Old Value New Value Changed 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. -
CVE Modified by [email protected]
Jul. 25, 2025
Action Type Old Value New Value Changed 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. -
New CVE Received by [email protected]
Jul. 24, 2025
Action Type Old Value New Value 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-1333 Added Reference https://fluidattacks.com/advisories/megadeth Added Reference https://github.com/gelbphoenix/autocaliweb Added Reference https://github.com/janeczku/calibre-web