Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-24556

20
FAUCET Score

CVE-2021-24556 is a Stored Cross-Site Scripting (XSS) vulnerability affecting the Email Subscriber WordPress plugin through version 1.1. It arises from improper sanitization and validation of the subscribe_email and subscribe_name POST parameters, allowing malicious scripts to be stored in the database and executed when an administrator views the subscriber list. Rated Medium severity (CVSS 6.1), it requires user interaction (UI:R) and could lead to limited confidentiality and integrity impacts (C:L, I:L). There is no evidence of active exploitation, public exploit code, or significant community discussion, indicating a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1CPE matchmatch criteria
cpe:2.3:a:email-subscriber_project:email-subscriber:*:*:*:*:*: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
1.34%
Probability of exploitation in next 30 days
EPSS Percentile
68.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0134 is in the 81st percentile among its peer group of 26,236 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

codevigilant.com / disclosure/2021/wp-plugin-email-subscriber
ExploitThird Party Advisory
wpscan.com / vulnerability/f050aedc-f79f-4b27-acac-0cdb33b25af8
ExploitThird Party Advisory