How severe is CVE-2023-5340?

CVE-2023-5340 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-5340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5340?

CVE-2023-5340 affects Fivestarplugins Five Star Restaurant Menu. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5340?

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

When was CVE-2023-5340 published?

CVE-2023-5340 was published on 2023-11-20 and last updated on 2026-06-17.

CVE-2023-5340

CVE-2023-5340 is a critical-severity vulnerability in Fivestarplugins Five Star Restaurant Menu with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Fivestarplugins Five Star Restaurant Menu
Published: 2023-11-20
Last modified: 2026-06-17

Description

The Five Star Restaurant Menu and Food Ordering WordPress plugin before 2.4.11 unserializes user input via an AJAX action available to unauthenticated users, allowing them to perform PHP Object Injection when a suitable gadget is present on the blog.

Frequently asked questions

What is CVE-2023-5340?: The Five Star Restaurant Menu and Food Ordering WordPress plugin before 2.4.11 unserializes user input via an AJAX action available to unauthenticated users, allowing them to perform PHP Object Injection when a suitable gadget is present on the blog.
How severe is CVE-2023-5340?: CVE-2023-5340 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-5340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5340?: CVE-2023-5340 affects Fivestarplugins Five Star Restaurant Menu. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5340?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-5340 published?: CVE-2023-5340 was published on 2023-11-20 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/91a5847a-62e7-4b98-a554-5eecb6a06e5b

Affected products (1)

cpe:2.3:a:fivestarplugins:five_star_restaurant_menu:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Fivestarplugins Five Star Restaurant Menu

CVE-2020-29045 — Critical (CVSS 9.8): The food-and-drink-menu plugin through 2.2.0 for WordPress allows remote attackers to execute arbitrary code because of…
CVE-2023-34017 — High (CVSS 7.1): Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in FiveStarPlugins Five Star Restaurant Reservations plugin…
CVE-2024-24838 — Medium (CVSS 6.5): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Five Star Plugins…
CVE-2024-5459 — Medium (CVSS 4.3): The Restaurant Menu and Food Ordering plugin for WordPress is vulnerable to unauthorized creation of data due to a…
CVE-2023-37985 — Medium (CVSS 4.3): Cross-Site Request Forgery (CSRF) vulnerability in FiveStarPlugins Restaurant Menu and Food Ordering plugin <= 2.4.6…

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