Vulnerability in Bridgeline Robots-Txt-Guard
CVE-2021-4305
A vulnerability was found in Woorank robots-txt-guard. It has been rated as problematic. Affected by this issue is the function makePathPattern of the file lib/patterns.js. The manipulation of the argument pattern leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. The name of the patch is c03827cd2f9933619c23894ce7c98401ea824020. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-217448.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.009 (59.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000
Affected products
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, Third Party Advisory)
- github.com/Woorank/robots-txt-guard/pull/4 (issue-tracking, Patch, Third Party Advisory, exploit)
- github.com/Woorank/robots-txt-guard/commit/c03827cd2f9933619c23894ce7c98401ea82… (Patch, Third Party Advisory, patch)
Frequently asked questions
- What is CVE-2021-4305?
- CVE-2021-4305 is a low-severity vulnerability in Bridgeline Robots-Txt-Guard, classified under Inefficient Regular Expression Complexity. CVSS score: 3.5/10. Published 2023-01-05.
- How severe is CVE-2021-4305?
- Low severity. CVSS v3 base score is 3.5 out of 10.