CVE-2023-45813

Name: CVE-2023-45813
Creator: NVD / NIST
Published: 2023-10-18T21:15:09.64+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2023-45813 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Torbot is an open source tor network intelligence tool. In affected versions the `torbot.modules.validators.validate_link function` uses the python-validators URL validation regex. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

Torbot is an open source tor network intelligence tool. In affected versions the `torbot.modules.validators.validate_link function` uses the python-validators URL validation regex. This particular regular expression has an exponential complexity which allows an attacker to cause an application crash using a well-crafted argument. An attacker can use a well-crafted URL argument to exploit the vulnerability in the regular expression and cause a Denial of Service on the system. The validators file has been removed in version 4.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.80%

51.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Torbot Project	Torbot	< 4.0.0
Validators Project	Validators	0.11.0
Validators Project	Validators	0.20.0

References

https://github.com/DedSecInside/TorBot/commit/ef6e06bc7785355b1701d5524eb4550441086ac4Patch
https://github.com/DedSecInside/TorBot/security/advisories/GHSA-72qw-p7hh-m3ffExploit, Vendor Advisory
https://github.com/DedSecInside/TorBot/commit/ef6e06bc7785355b1701d5524eb4550441086ac4Patch
https://github.com/DedSecInside/TorBot/security/advisories/GHSA-72qw-p7hh-m3ffExploit, Vendor Advisory

Timeline

Published: Oct 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-45813?

How severe is CVE-2023-45813?

CVE-2023-45813 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2023-45813?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-45813?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST