How severe is CVE-2013-4136?

CVE-2013-4136 has a CVSS 2.0 base score of 4.4, rated medium severity.

Is CVE-2013-4136 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4136?

CVE-2013-4136 primarily affects Phusion Passenger. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4136?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-4136 published?

CVE-2013-4136 was published on 2013-09-30 and last updated on 2026-06-16.

CVE-2013-4136

CVE-2013-4136 is a medium-severity vulnerability in Phusion Passenger with a CVSS 2.0 base score of 4.4. 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-59.

Key facts

Severity: Medium (CVSS 2.0 base score 4.4)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Phusion Passenger
Published: 2013-09-30
Last modified: 2026-06-16

Description

ext/common/ServerInstanceDir.h in Phusion Passenger gem before 4.0.6 for Ruby allows local users to gain privileges or possibly change the ownership of arbitrary directories via a symlink attack on a directory with a predictable name in /tmp/.

Frequently asked questions

What is CVE-2013-4136?: ext/common/ServerInstanceDir.h in Phusion Passenger gem before 4.0.6 for Ruby allows local users to gain privileges or possibly change the ownership of arbitrary directories via a symlink attack on a directory with a predictable name in /tmp/.
How severe is CVE-2013-4136?: CVE-2013-4136 has a CVSS 2.0 base score of 4.4, rated medium severity.
Is CVE-2013-4136 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4136?: CVE-2013-4136 primarily affects Phusion Passenger. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4136?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4136 published?: CVE-2013-4136 was published on 2013-09-30 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:phusion:passenger:*:*:*:*:*:*:*:*
cpe:2.3:a:phusion:passenger:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:phusion:passenger:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:phusion:passenger:4.0.3:*:*:*:*:*:*:*
cpe:2.3:a:phusion:passenger:4.0.4:*:*:*:*:*:*:*

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