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CVE-2021-39356

19
FAUCET Score

CVE-2021-39356 describes a Stored Cross-Site Scripting (XSS) vulnerability in the Content Staging WordPress plugin, affecting versions up to and including 2.0.1. This flaw stems from insufficient input validation and escaping, allowing administrative users to inject arbitrary web scripts through various parameters. The vulnerability has a CVSS score of 4.8 (Medium), indicating a network-based attack with low complexity, requiring high privileges and user interaction, potentially leading to limited impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.0.1CPE matchmatch criteria
cpe:2.3:a:content_staging_project:content_staging:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
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
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 93rd percentile among its peer group of 4,931 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

Remediation records are not available for this CVE.

References

github.com / BigTiger2020/word-press/blob/main/Content%20Staging.md
ExploitThird Party Advisory
plugins.trac.wordpress.org / browser/content-staging/trunk/templates/settings.php
Third Party Advisory
wordfence.com / vulnerability-advisories
Third Party Advisory