How severe is CVE-2023-1549?

CVE-2023-1549 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-1549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1549?

CVE-2023-1549 affects Ad Inserter Project Ad Inserter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-1549?

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-2023-1549 published?

CVE-2023-1549 was published on 2023-05-15 and last updated on 2026-06-17.

CVE-2023-1549

CVE-2023-1549 is a high-severity vulnerability in Ad Inserter Project Ad Inserter with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ad Inserter Project Ad Inserter
Published: 2023-05-15
Last modified: 2026-06-17

Description

The Ad Inserter WordPress plugin before 2.7.27 unserializes user input provided via the settings, which could allow high privilege users such as admin to perform PHP Object Injection when a suitable gadget is present

Frequently asked questions

What is CVE-2023-1549?: The Ad Inserter WordPress plugin before 2.7.27 unserializes user input provided via the settings, which could allow high privilege users such as admin to perform PHP Object Injection when a suitable gadget is present
How severe is CVE-2023-1549?: CVE-2023-1549 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-1549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1549?: CVE-2023-1549 affects Ad Inserter Project Ad Inserter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-1549?: 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-2023-1549 published?: CVE-2023-1549 was published on 2023-05-15 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/c94b3a68-673b-44d7-9251-f3590cc5ee9e

Affected products (1)

cpe:2.3:a:ad_inserter_project:ad_inserter:*:*:*:*:*:wordpress:*:*

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