CVE-2021-4305

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.94% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 58.4% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-01-05 10:03Z3 YR AGO

Last updated

2024-11-25 17:49Z1 YR AGO

Reserved

2023-01-05

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Low (CVSS 3.5)

CNA CVSS vector

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

Weaknesses

• CWE-1333Inefficient Regular Expression ComplexityBase

Data version

5.1

Document digest

90524eba056f4772ccd96bdc9d9af9dce5dcd09eacad03048e57ba9f6ff36b15

• vuldb.comhttps://vuldb.com/?id.217448vdb-entrytechnical-description
• vuldb.comhttps://vuldb.com/?ctiid.217448signaturepermissions-required
• github.comhttps://github.com/Woorank/robots-txt-guard/pull/4exploitissue-tracking
• github.comhttps://github.com/Woorank/robots-txt-guard/commit/c03827cd2f9933619c23894ce7c98401ea824020patch