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Http Server CVE-2025-59775

| EUVDEUVD-2025-201394 HIGH
Server-Side Request Forgery (SSRF) (CWE-918)
2025-12-05 security@apache.org
Apache SSRF Microsoft Http Server
7.5
CVSS 3.1 · Vendor: apache
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Vulnerability Assessment

Weakness
CWE
CWE-918
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service URL allowlisting, SSRF prevention
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Credential Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

Access to internal services, cloud metadata endpoints, or other resources not intended to be publicly accessible. Can lead to data exfiltration or further exploitation. With a CVSS score of 7.5 (HIGH), this represents a significant risk.
Exploit ScenarioDerived

An attacker provides a URL pointing to an internal service (e.g., http://169.254.169.254/latest/meta-data/) through a vulnerable parameter, causing the server to fetch and return internal data.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

Server-Side Request Forgery (SSRF) vulnerability

in Apache HTTP Server on Windows

with AllowEncodedSlashes On and MergeSlashes Off  allows to potentially leak NTLM hashes to a malicious server via SSRF and malicious requests or content

Users are recommended to upgrade to version 2.4.66, which fixes the issue.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 17:08 CVSS 7.5

RemediationAI

Validate and whitelist allowed URLs and IP ranges. Block requests to internal/private IP ranges. Use network segmentation to limit server-side request scope.

Affected VersionsENISA

Apache HTTP Server 2.4.0 ≤2.4.65

Affected Packages

euvd apache_http_server no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Technical ContextAI · show details

Server-Side Request Forgery allows an attacker to induce the server to make HTTP requests to arbitrary destinations, including internal services. This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918).

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

Vendor (apache) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Ubuntu MEDIUM
SUSE HIGH
Red Hat 7.5 HIGH

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
CVE Published
Dec 05, 2025 - 11:15 nvd
HIGH 7.5

Executive ViewAI

Why It Matters

Apache HTTP Server installations on Windows with specific configurations are vulnerable to credential theft through SSRF attacks, potentially exposing NTLM authentication hashes to unauthorized parties. This affects organizations running affected Apache versions and could lead to lateral movement and unauthorized access if credentials are compromised.

Business Impact: High
Compensating Controls

Disable AllowEncodedSlashes directive or set MergeSlashes On to eliminate attack vector; implement WAF rules blocking double-encoded slash patterns (%252F); restrict outbound network access from Apache servers using firewall rules; segment Apache servers on isolated VLANs; enforce network-level controls preventing credential exposure to external hosts; monitor outbound NTLM authentication attempts; enable request logging and SIEM alerting for suspicious patterns.

Threat Intelligence Overview

EPSS Score
0.1%
Top 83% exploitable
Exploit
POC
Public exploit code exists
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS MSRC Vendor GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC Yes
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Out-of-Cycle
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

58
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Server-Side Request Forgery HIGH

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)

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CVE-2021-34473 CRITICAL POC
9.1
CVE-2021-26855 CRITICAL POC
9.1
CVE-2021-21985 CRITICAL POC
9.8
CVE-2022-41040 HIGH POC
8.8
CVE-2024-21893 HIGH POC
8.2
CVE-2021-22054 HIGH POC
7.5
CVE-2021-21975 HIGH POC
7.5

Same technique SSRF

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CVE-2016-3718 MEDIUM POC
5.5

Vendor StatusVendor

Ubuntu

Priority: Medium
apache2
Release Status Version
upstream not-affected debian: Only affects Apache on Windows
bionic not-affected windows only
focal not-affected windows only
jammy not-affected windows only
noble not-affected windows only
plucky not-affected windows only
questing not-affected windows only
trusty not-affected windows only
xenial not-affected windows only

Debian

apache2
Release Status Fixed Version Urgency
bullseye fixed 2.4.62-1~deb11u1 -
bullseye (security) fixed 2.4.66-1~deb11u1 -
bookworm fixed 2.4.66-1~deb12u1 -
bookworm (security) fixed 2.4.62-1~deb12u2 -
trixie fixed 2.4.66-1~deb13u2 -
forky, sid fixed 2.4.66-8 -
(unstable) not-affected - -

SUSE

Severity: High
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed

References

Advisories & patches
ADVISORY https://httpd.apache.org/security/vulnerabilities_24.html ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-59775 ADVISORY https://vuldb.com/vuln/334272 REF http://www.openwall.com/lists/oss-security/2025/12/04/6

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