CVE-2021-3258

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.64% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 74.3% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-02-05 15:38Z5 YR AGO

Last updated

2024-08-03 16:53Z2 YR AGO

Reserved

2021-01-22

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

c0e1ba9ac18b82e62dc83d215c4a67998cfae9edb0f2603166a90b90c536e102

• nirmaldahal.com.nphttps://nirmaldahal.com.np/sxss-to-defacement-and-account-takeover/x_refsource_MISC
• www.question2answer.orghttps://www.question2answer.org/qa/58520/important-q2a-ultimate-seo-important-updatex_refsource_MISC
• github.comhttps://github.com/q2a-projects/Q2A-Ultimate-SEO/commit/20069f28147c6f2c3acca4e3f6f5154537c5d536x_refsource_MISC