TI-2021-03163 Aliases CVE-2021-4305 GHSA-6g33-8w2q-4hxv

Woorank robots-txt-guard patterns.js makePathPattern redos

LOW 35CWE-1333Published 2023-01-05 · Updated 2024-11-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01027 63rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Fixed robots-txt-guard (npm): 1.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Woorank	robots-txt-guard	all versions	—	No fix listed	CNA
—	robots-txt-guard (npm)	before 1.0.2	1.0.2	Patch available	GHSA-6g33-8w2q-4hxv

robots-txt-guard VendorWoorank Affected all versions Fixed in — No fix listed CNA
robots-txt-guard (npm) Vendor— Affected before 1.0.2 Fixed in 1.0.2 Patch available GHSA-6g33-8w2q-4hxv

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:bridgeline:robots-txt-guard::::::::	before 2021-02-07	Vulnerable	Bridgeline

cpe:2.3:a:bridgeline:robots-txt-guard:*:*:*:*:*:*:*:* Versions before 2021-02-07 Vulnerable ·Bridgeline

Remediation

Fix · GHSA-6g33-8w2q-4hxv robots-txt-guard (npm) Fixed in 1.0.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-4305
2026-10-03 Alias added: GHSA-6g33-8w2q-4hxv

References

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences