How severe is CVE-2017-7991?

CVE-2017-7991 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-2017-7991 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7991?

CVE-2017-7991 affects Exponentcms Exponent Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-7991?

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-2017-7991 published?

CVE-2017-7991 was published on 2017-04-22 and last updated on 2026-06-17.

CVE-2017-7991

CVE-2017-7991 is a critical-severity vulnerability in Exponentcms Exponent Cms 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Exponentcms Exponent Cms
Published: 2017-04-22
Last modified: 2026-06-17

Description

Exponent CMS 2.4.1 and earlier has SQL injection via a base64 serialized API key (apikey parameter) in the api function of framework/modules/eaas/controllers/eaasController.php.

Frequently asked questions

What is CVE-2017-7991?: Exponent CMS 2.4.1 and earlier has SQL injection via a base64 serialized API key (apikey parameter) in the api function of framework/modules/eaas/controllers/eaasController.php.
How severe is CVE-2017-7991?: CVE-2017-7991 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-2017-7991 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7991?: CVE-2017-7991 affects Exponentcms Exponent Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-7991?: 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-2017-7991 published?: CVE-2017-7991 was published on 2017-04-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:exponentcms:exponent_cms:*:*:*:*:*:*:*:*

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