CVE-2021-24371Public exploitNetwork attack vector

Internal network scanning via unvalidated import URL

Published Aug 2, 2021 · Updated Aug 3, 2024

SSRF in RSVPMaker before 8.7.3 allows remote authenticated users to scan internal network services through its import feature. The rsvpmaker_export_screen path passes the supplied importrsvp URL to wp_remote_get without restricting its destination. Administrator access and a valid WordPress nonce are required, and response errors disclose whether a requested internal port accepts connections.

CVSS severity2.7
Low
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in RSVPMaker before 8.7.3 allows remote authenticated users to scan internal network services through its import feature. The rsvpmaker_export_screen path passes the supplied importrsvp URL to wp_remote_get without restricting its destination. Administrator access and a valid WordPress nonce are required, and response errors disclose whether a requested internal port accepts connections.

The record

CVE
CVE-2021-24371
Published
Aug 2, 2021
Updated
Aug 3, 2024
Vendor
David F. Carr
Product
RSVPMaker
Classifications
CWE-918, T1046
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=8.7.3 <8.7.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

David F. Carr · RSVPMakerversion=8.7.3 <8.7.3

Published CVSS scores

2.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Scanning

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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