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CVE-2021-34640

30
FAUCET Score

CVE-2021-34640 describes a Reflected Cross-Site Scripting (XSS) vulnerability in the Securimage-WP-Fixed WordPress plugin, affecting versions up to and including 3.5.4. This flaw arises from improper sanitization of the $_SERVER['PHP_SELF'] variable, allowing attackers to inject malicious web scripts. Rated 6.1 MEDIUM on the CVSS scale, it requires user interaction (UI:R) but can be exploited remotely (AV:N) with low complexity (AC:L), potentially leading to information disclosure (C:L) and integrity compromise (I:L). While no active exploitation or Metasploit modules are reported, Nuclei templates exist, and there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.5.4CPE matchmatch criteria
cpe:2.3:a:securimage-wp-fixed_project:securimage-wp-fixed:*:*:*:*:*: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
2.31%
Probability of exploitation in next 30 days
EPSS Percentile
81.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-34640 · Sep 29, 2021
This CVE's current EPSS score of 0.0231 is in the 91st percentile among its peer group of 26,220 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/securimage-wp-fixed/trunk/securimage-wp.php
ExploitThird Party Advisory
wordfence.com / vulnerability-advisories
ExploitThird Party Advisory