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CVE-2015-0881

15
FAUCET Score

CVE-2015-0881 describes a CRLF injection vulnerability in Squid versions prior to 3.1.1, allowing remote attackers to inject arbitrary HTTP headers and perform HTTP response splitting attacks. This vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial integrity impact, with no authentication required. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.1.0.18CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.51%
Probability of exploitation in next 30 days
EPSS Percentile
90.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0451 is in the 88th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: squid

Vendor Advisories (1)

redhatCVE-2015-0881Moderate

squid: CRLF injection flaw permitting HTTP response splitting attacks

Mar 6, 2015

References

jvndb.jvn.jp / jvndb/JVNDB-2015-000019
Vendor Advisory
jvn.jp / en/jp/JVN64455813/index.html
Vendor Advisory