CVE-2023-3977Network attack vector

Unauthorized plugin installation via missing nonce validation

Published Jul 28, 2023 · Updated Apr 8, 2026

CSRF in affected Inisev WordPress plugins allows remote attackers to install limited plugins via forged administrator requests. The handle_installation function accepts the inisev_installation AJAX action without validating a request nonce before starting installation. Exploitation requires an authenticated site administrator to follow an attacker-controlled link, and the resulting change is limited to plugins offered by the affected installer.

CVSS severity4.3
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in affected Inisev WordPress plugins allows remote attackers to install limited plugins via forged administrator requests. The handle_installation function accepts the inisev_installation AJAX action without validating a request nonce before starting installation. Exploitation requires an authenticated site administrator to follow an attacker-controlled link, and the resulting change is limited to plugins offered by the affected installer.

The record

CVE
CVE-2023-3977
Published
Jul 28, 2023
Updated
Apr 8, 2026
Vendor
s-feeds
Product
RSS Redirect & Feedburner Alternative
Classifications
CWE-352, CAPEC-62, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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 <=3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

s-feeds · RSS Redirect & Feedburner Alternativeversion=0 <=3.7
Copy Delete Posts · Duplicate Postversion=0 <=1.3.9
Copy Delete Posts · Backup Migrationversion=0 <=1.2.7
Copy Delete Posts · Social Media Share Buttons & Social Sharing Iconsversion=0 <=2.8.1
Copy Delete Posts · Pop-upversion=0 <=1.1.9
Copy Delete Posts · Social Share Icons & Social Share Buttonsversion=0 <=3.5.7
Inisev · Redirectionversion=0 <=1.1.3
Copy Delete Posts · Ultimate Posts Widgetversion=0 <=2.2.4
Copy Delete Posts · Enhanced Text Widgetversion=0 <=1.5.7
Steve85b · SSL Mixed Content Fixversion=0 <=3.2.3

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204.001User Execution Malicious Link

Public exploit references

No public exploit references are available in this record.

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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