CVE-2023-1977: The Booking Manager WordPress plugin before 2.0.29 does not validate URLs input in it's admin panel or in shor

Q: How do I fix CVE-2023-1977?

booking manager: upgrade to 2.0.29. Exact commands for each OS are on this page.

Q: Is CVE-2023-1977 being exploited?

CVE-2023-1977 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-1977 affect?

CVE-2023-1977 affects booking manager. Severity is high (CVSS 8.8). 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 attac

Q: How urgent is CVE-2023-1977?

Priority 50/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2023-1977 is a high-severity flaw (CVSS 8.8) affecting booking manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Published	2023-08-16
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: oplugins

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-08-16 12:15 UTCPublished CVE record published
2026-06-17 05:29 UTCUpdated Record last modified

oplugins booking manager UPGRADE

Affected: < 2.0.29

Fixed in: 2.0.29

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy booking-manager || rpm -q booking-manager || booking-manager --version

2. UPGRADE to 2.0.29 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade booking-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade booking-manager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-1977?

booking manager: upgrade to 2.0.29. Exact commands for each OS are on this page.

Is CVE-2023-1977 being exploited?

CVE-2023-1977 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-1977 affect?

CVE-2023-1977 affects booking manager. Severity is high (CVSS 8.8). 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 attac

How urgent is CVE-2023-1977?

Priority 50/100. High severity; Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2023-50840 HIGH 8.5 UPGRADE Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in wpdevelo

References

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