What is CVE-2023-1977?

CVE-2023-1977 is a high-severity vulnerability in Oplugins Booking Manager, classified under CWE-918 SERVER-SIDE REQUEST FORGERY (SSRF). CVSS score: 8.8/10. Published 2023-08-16.

How severe is CVE-2023-1977?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2023-1977 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Oplugins Booking Manager

CVE-2023-1977

The Booking Manager WordPress plugin before 2.0.29 does not validate URLs input in it's admin panel or in shortcodes for showing events from a remote .ics file, allowing an attacker with privileges as low as Subscriber to perform SSRF attacks on the sites internal network.

Published 2023-08-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.8th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Oplugins Booking Manager
Booking Manager — versions 0

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/842f3b1f-395a-4ea2-b7df-a36f70e8c790 (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-1977?: CVE-2023-1977 is a high-severity vulnerability in Oplugins Booking Manager, classified under CWE-918 SERVER-SIDE REQUEST FORGERY (SSRF). CVSS score: 8.8/10. Published 2023-08-16.
How severe is CVE-2023-1977?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2023-1977 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.