How severe is CVE-2013-4521?

CVE-2013-4521 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-2013-4521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4521?

CVE-2013-4521 primarily affects Nuxeo. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4521?

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-2013-4521 published?

CVE-2013-4521 was published on 2020-02-06 and last updated on 2026-06-16.

CVE-2013-4521

CVE-2013-4521 is a critical-severity vulnerability in Nuxeo 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Nuxeo
Published: 2020-02-06
Last modified: 2026-06-16

Description

RichFaces implementation in Nuxeo Platform 5.6.0 before HF27 and 5.8.0 before HF-01 does not restrict the classes for which deserialization methods can be called, which allows remote attackers to execute arbitrary code via crafted serialized data. NOTE: this vulnerability may overlap CVE-2013-2165.

Frequently asked questions

What is CVE-2013-4521?: RichFaces implementation in Nuxeo Platform 5.6.0 before HF27 and 5.8.0 before HF-01 does not restrict the classes for which deserialization methods can be called, which allows remote attackers to execute arbitrary code via crafted serialized data. NOTE: this vulnerability may overlap CVE-2013-2165.
How severe is CVE-2013-4521?: CVE-2013-4521 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-2013-4521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4521?: CVE-2013-4521 primarily affects Nuxeo. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4521?: 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-2013-4521 published?: CVE-2013-4521 was published on 2020-02-06 and last updated on 2026-06-16.

References

Affected products (28)

cpe:2.3:a:nuxeo:nuxeo:5.6.0:-:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix01:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix02:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix03:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix04:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix05:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix06:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix07:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix08:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix09:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix10:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix11:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix12:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix13:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix14:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix15:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix16:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix17:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix18:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix19:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix20:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix21:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix22:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix23:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix24:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix25:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.6.0:hotfix26:*:*:*:*:*:*
cpe:2.3:a:nuxeo:nuxeo:5.8.0:-:*:*:*:*:*:*

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