THREATPORT/VULNERABILITY/CVE-2023-25725
CRITICAL SEVERITY

CVE-2023-25725

Haproxy vulnerability

CVSS
9.1
EPSS
5.5%
EPSS pct
92th
Exploited
No known
HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.
Affected vendor
Haproxy
Affected product
Haproxy
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness type (CWE)
Published
2023-02-14

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to integrity, high impact to availability.

Its EPSS score of 5.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2023-25725

  • Confirm whether Haproxy Haproxy is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2023-25725.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2023-25725

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2023-25725 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2023-25725?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2023-25725.

Start free scan

No credit card. Agentless.

Related vulnerabilities

CRITICAL
CVE-2012-1124
Phxeventmanager vulnerability
CRITICAL
CVE-2014-0234
Openshift vulnerability
CRITICAL
CVE-2014-2595
Web Application Firewall vulnerability