How severe is CVE-2015-5209?

CVE-2015-5209 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2015-5209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5209?

CVE-2015-5209 primarily affects Apache Struts. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-5209?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-5209 published?

CVE-2015-5209 was published on 2017-08-29 and last updated on 2026-06-17.

CVE-2015-5209

CVE-2015-5209 is a high-severity vulnerability in Apache Struts with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Struts
Published: 2017-08-29
Last modified: 2026-06-17

Description

Apache Struts 2.x before 2.3.24.1 allows remote attackers to manipulate Struts internals, alter user sessions, or affect container settings via vectors involving a top object.

Frequently asked questions

What is CVE-2015-5209?: Apache Struts 2.x before 2.3.24.1 allows remote attackers to manipulate Struts internals, alter user sessions, or affect container settings via vectors involving a top object.
How severe is CVE-2015-5209?: CVE-2015-5209 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2015-5209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5209?: CVE-2015-5209 primarily affects Apache Struts. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-5209?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-5209 published?: CVE-2015-5209 was published on 2017-08-29 and last updated on 2026-06-17.

References

Affected products (66)

cpe:2.3:a:apache:struts:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.10:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.11.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.11.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.12:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.13:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.0.14:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.1.8.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.1.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.4.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:struts:2.3.8:*:*:*:*:*:*:*

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