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CVE-2021-3258

20
FAUCET Score

CVE-2021-3258 is a cross-site scripting (XSS) vulnerability affecting Question2Answer Q2A Ultimate SEO Version 1.3, which could potentially lead to arbitrary remote code execution. With a CVSS score of 5.4 (Medium), this vulnerability requires low privileges and user interaction, but has a network attack vector and low impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.3CPE matchmatch criteria
cpe:2.3:a:qa-themes:q2a_ultimate_seo:1.3:*:*:*:*:question2answer:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.64%
Probability of exploitation in next 30 days
EPSS Percentile
74.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0164 is in the 97th percentile among its peer group of 15,224 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / q2a-projects/Q2A-Ultimate-SEO/commit/20069f28147c6f2c3acca4e3f6f5154537c5d536
PatchThird Party Advisory
nirmaldahal.com.np / sxss-to-defacement-and-account-takeover
ExploitThird Party Advisory
question2answer.org / qa/58520/important-q2a-ultimate-seo-important-update
Release NotesVendor Advisory