CVE-2021-38351

FAUCET Score

CVE-2021-38351 describes a Reflected Cross-Site Scripting (XSS) vulnerability in the OSD Subscribe WordPress plugin, affecting versions up to and including 1.2.3. This flaw allows attackers to inject arbitrary web scripts through the 'osd_subscribe_message' parameter. Rated 6.1 (Medium) on CVSS, it requires user interaction and could lead to limited data compromise and integrity impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 1.2.3CPE matchmatch criteria	cpe:2.3:a:outsidesource:osd_subscribe::::::wordpress::*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

2.7

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.90%

Probability of exploitation in next 30 days

EPSS Percentile

55.8%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0089 is in the 67th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

plugins.trac.wordpress.org / browser/osd-subscribe/tags/1.2.3/options/osd_subscribe_options_subscribers.php

ExploitThird Party Advisory

wordfence.com / vulnerability-advisories

Third Party Advisory