CVE-2023-1977Public exploitNetwork attack vector

Authenticated internal network probing via unvalidated iCalendar URLs

Published Aug 16, 2023 · Updated Oct 8, 2024

SSRF in wpdevelop Booking Manager before 2.0.29 allows remote authenticated users to probe internal services through crafted iCalendar URLs. The wpbm_get_ssl_page_content function fetches a shortcode-supplied URL without validating its destination, causing WordPress to issue arbitrary HTTP requests. Subscriber-level access to the parse-media-shortcode AJAX action is sufficient; response content or timing reveals internal HTTP services and open ports.

CVSS severity8.8
High
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in wpdevelop Booking Manager before 2.0.29 allows remote authenticated users to probe internal services through crafted iCalendar URLs. The wpbm_get_ssl_page_content function fetches a shortcode-supplied URL without validating its destination, causing WordPress to issue arbitrary HTTP requests. Subscriber-level access to the parse-media-shortcode AJAX action is sufficient; response content or timing reveals internal HTTP services and open ports.

The record

CVE
CVE-2023-1977
Published
Aug 16, 2023
Updated
Oct 8, 2024
Vendor
wpdevelop
Product
Booking Manager
Classifications
CWE-918, T1046
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 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 <2.0.29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

wpdevelop · Booking Managerversion=0 <2.0.29

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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
Privilegesauthenticated
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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