How severe is CVE-2015-5721?

CVE-2015-5721 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-2015-5721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5721?

CVE-2015-5721 affects Misp-project Misp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5721?

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-2015-5721 published?

CVE-2015-5721 was published on 2016-09-03 and last updated on 2026-06-23.

CVE-2015-5721

CVE-2015-5721 is a critical-severity vulnerability in Misp-project Misp 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Misp-project Misp
Published: 2016-09-03
Last modified: 2026-06-23

Description

Malware Information Sharing Platform (MISP) before 2.3.90 allows remote attackers to conduct PHP object injection attacks via crafted serialized data, related to TemplatesController.php and populate_event_from_template_attributes.ctp.

Frequently asked questions

What is CVE-2015-5721?: Malware Information Sharing Platform (MISP) before 2.3.90 allows remote attackers to conduct PHP object injection attacks via crafted serialized data, related to TemplatesController.php and populate_event_from_template_attributes.ctp.
How severe is CVE-2015-5721?: CVE-2015-5721 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-2015-5721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5721?: CVE-2015-5721 affects Misp-project Misp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5721?: 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-2015-5721 published?: CVE-2015-5721 was published on 2016-09-03 and last updated on 2026-06-23.

References

Affected products (1)

cpe:2.3:a:misp-project:misp:*:*:*:*:*:*:*:*

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