How severe is CVE-2015-0881?

CVE-2015-0881 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-0881 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-0881?

CVE-2015-0881 affects Squid-cache Squid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-0881?

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

When was CVE-2015-0881 published?

CVE-2015-0881 was published on 2015-02-20 and last updated on 2026-06-17.

CVE-2015-0881

CVE-2015-0881 is a medium-severity vulnerability in Squid-cache Squid with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 5% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Squid-cache Squid
Published: 2015-02-20
Last modified: 2026-06-17

Description

CRLF injection vulnerability in Squid before 3.1.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted header in a response.

Frequently asked questions

What is CVE-2015-0881?: CRLF injection vulnerability in Squid before 3.1.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted header in a response.
How severe is CVE-2015-0881?: CVE-2015-0881 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-0881 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-0881?: CVE-2015-0881 affects Squid-cache Squid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-0881?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-0881 published?: CVE-2015-0881 was published on 2015-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

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