How severe is CVE-2016-3154?

CVE-2016-3154 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-2016-3154 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-3154?

CVE-2016-3154 primarily affects Spip. In total, 62 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-3154?

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-2016-3154 published?

CVE-2016-3154 was published on 2016-04-08 and last updated on 2026-06-17.

CVE-2016-3154

CVE-2016-3154 is a critical-severity vulnerability in Spip 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: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Spip
Published: 2016-04-08
Last modified: 2026-06-17

Description

The encoder_contexte_ajax function in ecrire/inc/filtres.php in SPIP 2.x before 2.1.19, 3.0.x before 3.0.22, and 3.1.x before 3.1.1 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object.

Frequently asked questions

What is CVE-2016-3154?: The encoder_contexte_ajax function in ecrire/inc/filtres.php in SPIP 2.x before 2.1.19, 3.0.x before 3.0.22, and 3.1.x before 3.1.1 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object.
How severe is CVE-2016-3154?: CVE-2016-3154 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-2016-3154 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-3154?: CVE-2016-3154 primarily affects Spip. In total, 62 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-3154?: 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-2016-3154 published?: CVE-2016-3154 was published on 2016-04-08 and last updated on 2026-06-17.

References

Affected products (62)

cpe:2.3:a:spip:spip:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.10:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.12:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.13:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.14:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.15:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.16:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.17:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.18:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.19:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.20:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.21:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.0.22:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.4:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.5:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.6:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.7:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.8:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.9:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.10:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.11:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.12:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.13:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.14:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.15:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.16:*:*:*:*:*:*:*
cpe:2.3:a:spip:spip:2.1.17:*:*:*:*:*:*:*

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