CVE-2023-5641Public exploitNetwork attack vector

Administrator-session script execution via unescaped nonce parameter

Published Nov 27, 2023 · Updated Aug 2, 2024

Reflected XSS in Martins Free & Easy SEO BackLink Link Building Network before 1.2.30 allows remote attackers to run browser script. The plugin returns the _wpnonce query value from a WordPress plugins.php deactivation request without sanitizing or escaping it. Exploitation requires a logged-in administrator to open the crafted URL, after which attacker-controlled script runs in the dashboard origin.

CVSS severity6.1
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Martins Free & Easy SEO BackLink Link Building Network before 1.2.30 allows remote attackers to run browser script. The plugin returns the _wpnonce query value from a WordPress plugins.php deactivation request without sanitizing or escaping it. Exploitation requires a logged-in administrator to open the crafted URL, after which attacker-controlled script runs in the dashboard origin.

The record

CVE
CVE-2023-5641
Published
Nov 27, 2023
Updated
Aug 2, 2024
Vendor
Martins Tools
Product
Martins Free And Easy SEO BackLink Link Building Network, Improve Rankings And Traffic
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.2.30

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Martins Tools · Martins Free And Easy SEO BackLink Link Building Network, Improve Rankings And Trafficversion=0 <1.2.30

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Cross-Site Scripting (XSS)
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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