How severe is CVE-2015-8351?

CVE-2015-8351 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-8351 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 37% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8351?

CVE-2015-8351 affects Gwolle Guestbook Project Gwolle Guestbook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-8351?

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-2015-8351 published?

CVE-2015-8351 was published on 2017-09-11 and last updated on 2026-06-17.

CVE-2015-8351

CVE-2015-8351 is a critical-severity vulnerability in Gwolle Guestbook Project Gwolle Guestbook with a CVSS 3.x base score of 9.0. Its EPSS exploit-prediction score of 37% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
CVSS v2: 6.8
EPSS exploit prediction: 37% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Gwolle Guestbook Project Gwolle Guestbook
Published: 2017-09-11
Last modified: 2026-06-17

Description

PHP remote file inclusion vulnerability in the Gwolle Guestbook plugin before 1.5.4 for WordPress, when allow_url_include is enabled, allows remote authenticated users to execute arbitrary PHP code via a URL in the abspath parameter to frontend/captcha/ajaxresponse.php. NOTE: this can also be leveraged to include and execute arbitrary local files via directory traversal sequences regardless of whether allow_url_include is enabled.

Frequently asked questions

What is CVE-2015-8351?: PHP remote file inclusion vulnerability in the Gwolle Guestbook plugin before 1.5.4 for WordPress, when allow_url_include is enabled, allows remote authenticated users to execute arbitrary PHP code via a URL in the abspath parameter to frontend/captcha/ajaxresponse.php. NOTE: this can also be leveraged to include and execute arbitrary local files via directory traversal sequences regardless of whether allow_url_include is enabled.
How severe is CVE-2015-8351?: CVE-2015-8351 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-8351 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 37% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8351?: CVE-2015-8351 affects Gwolle Guestbook Project Gwolle Guestbook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-8351?: 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-2015-8351 published?: CVE-2015-8351 was published on 2017-09-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gwolle_guestbook_project:gwolle_guestbook:*:*:*:*:*:wordpress:*:*

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