How severe is CVE-2023-1977?

CVE-2023-1977 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-1977 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1977?

CVE-2023-1977 affects Oplugins Booking Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-1977?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-1977 published?

CVE-2023-1977 was published on 2023-08-16 and last updated on 2026-06-17.

CVE-2023-1977

CVE-2023-1977 is a high-severity vulnerability in Oplugins Booking Manager with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Oplugins Booking Manager
Published: 2023-08-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2023-1977?: CVE-2023-1977 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-1977 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1977?: CVE-2023-1977 affects Oplugins Booking Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-1977?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-1977 published?: CVE-2023-1977 was published on 2023-08-16 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/842f3b1f-395a-4ea2-b7df-a36f70e8c790

Affected products (1)

cpe:2.3:a:oplugins:booking_manager:*:*:*:*:*:wordpress:*:*

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