HOMEVULNERABILITIESCVE-2023-45539
HIGH

CVE-2023-45539

NVD-CWE-noinfoPublished: November 28, 2023· Updated: Jun 17, 2026

8.2
CVSS v3.1

Official Description

HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have unspecified other impact upon misinterpretation of a path_end rule, such as routing index.html#.png to a static server.

NVD Source

Technical Analysis

CVE-2023-45539 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 8.2.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected Vendors & Products

haproxy1 product(s)
haproxy
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (8)

→
https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=2eab6d354322932cfec2ed54de261e4347eca9a6Broken Link
→
https://lists.debian.org/debian-lts-announce/2023/12/msg00010.html
→
https://lists.w3.org/Archives/Public/ietf-http-wg/2023JulSep/0070.htmlMailing List
→
https://www.mail-archive.com/haproxy%40formilux.org/msg43861.htmlRelease Notes
→
https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=2eab6d354322932cfec2ed54de261e4347eca9a6Broken Link
→
https://lists.debian.org/debian-lts-announce/2023/12/msg00010.html
→
https://lists.w3.org/Archives/Public/ietf-http-wg/2023JulSep/0070.htmlMailing List
→
https://www.mail-archive.com/haproxy%40formilux.org/msg43861.htmlRelease Notes

Quick Facts

CVE IDCVE-2023-45539
CVSS Score8.2 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedNov 28, 2023

Related CVEs (NVD-CWE-noinfo)

CVE-2011-0807
10.0
CVE-2008-0339
10.0
CVE-2009-1314
10.0
CVE-2017-3623
10.0
CVE-2015-5895
10.0
CVE-2012-5692
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-45539 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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