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NVD / CVE Program· CNA apache

CVE-2024-38475: Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.

Noroxi assessment

Priority: Now (action score 96/100)

  • CISA has confirmed exploitation in the wild (May 1, 2025). Remediation deadline for US federal agencies: May 22, 2025.
  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 99.9% (FIRST EPSS); higher than 99.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: httpd (AlmaLinux:8) 2.4.37-65.module_el8.10.0+3872+9b8ab21e.1; httpd-devel (AlmaLinux:8) 2.4.37-65.module_el8.10.0+3872+9b8ab21e.1; httpd-filesystem (AlmaLinux:8) 2.4.37-65.module_el8.10.0+3872+9b8ab21e.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Upgrade to httpd (AlmaLinux:8) 2.4.37-65.module_el8.10.0+3872+9b8ab21e.1; httpd-devel (AlmaLinux:8) 2.4.37-65.module_el8.10.0+3872+9b8ab21e.1; httpd-filesystem (AlmaLinux:8) 2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected.  Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.

CriticalCVSS 9.1 · v3.1KEVWeaponized Fix available
Published
Jul 1, 2024
Updated
Jun 17, 2026
EPSS
99.9% · 99th percentile

Report tools

JSON

Action score

96

Now

Patch today or shut off access.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
30 / 30 · Listed
EPSS
30 / 30 · 99.9%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on May 1, 2025. That signals real attacks, not theory.

Remediation deadline for US federal agencies: May 22, 2025.

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  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
apachehttp server
netappontap 9
sonicwallsma 200 firmware
sonicwallsma 200
sonicwallsma 210 firmware
sonicwallsma 210
sonicwallsma 400 firmware
sonicwallsma 400
sonicwallsma 410 firmware
sonicwallsma 410
sonicwallsma 500v firmware
sonicwallsma 500v

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When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or gets exploit code

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Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache http server2.4.0 and later · before 2.4.60
  • sonicwall sma 200 firmwarebefore 10.2.1.14-75sv
  • sonicwall sma 210 firmwarebefore 10.2.1.14-75sv
  • sonicwall sma 400 firmwarebefore 10.2.1.14-75sv
  • sonicwall sma 410 firmwarebefore 10.2.1.14-75sv
  • sonicwall sma 500v firmwarebefore 10.2.1.14-75sv

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

  • Apache Software Foundation Apache HTTP Server

    • 2.4.0 and later · up to and including 2.4.59affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8httpdbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-develbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-filesystembefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-manualbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-toolsbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_http2before 1.15.7-10.module_el8.10.0+3832+564e76531.15.7-10.module_el8.10.0+3832+564e7653
AlmaLinux:8mod_ldapbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_mdbefore 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
AlmaLinux:8mod_mdbefore 1:2.0.8-8.module_el8.6.0+3031+fb177b091:2.0.8-8.module_el8.6.0+3031+fb177b09
AlmaLinux:8mod_proxy_htmlbefore 1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.11:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_sessionbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_sslbefore 1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.11:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:9httpdbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-corebefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-develbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-filesystembefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-manualbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-toolsbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_ldapbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_luabefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_proxy_htmlbefore 1:2.4.57-11.el9_41:2.4.57-11.el9_4
AlmaLinux:9mod_sessionbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_sslbefore 1:2.4.57-11.el9_41:2.4.57-11.el9_4
Alpine:v3.17apache2before 2.4.60-r02.4.60-r0

+96

Same product

apache: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-42013Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)KEV
    99Now
  • CVE-2021-41773Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49KEV
    99Now
  • CVE-2019-0211In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes orKEV
    81Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-38473Jul 1, 2024 · Apache HTTP Server proxy encoding problem
    40Plan
  • ← EarlierCVE-2024-38474Jul 1, 2024 · Apache HTTP Server weakness with encoded question marks in backreferences
    40Plan
  • Later →CVE-2024-38476Jul 1, 2024 · Apache HTTP Server may use exploitable/malicious backend application output to run local handlers via internal redirect
    51Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:httpd2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-core2.4.57-11.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:httpd-devel2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-filesystem2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-manual2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-tools2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_http21.15.7-10.module_el8.10.0+3832+564e7653 · AlmaLinux:8Package registry (OSV)
almalinux:mod_ldap2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_md1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa · AlmaLinux:8Package registry (OSV)
almalinux:mod_proxy_html1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_session2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_ssl1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
alpine:apache22.4.60-r0 · Alpine:v3.17Package registry (OSV)
debian:apache22.4.61-1~deb12u1 · Debian:12Package registry (OSV)
opensuse:apache22.4.58-150600.5.18.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-devel2.4.58-150600.5.18.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-event2.4.58-150600.5.18.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-manual2.4.58-150600.5.18.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-prefork2.4.58-150600.5.18.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-utils2.4.58-150600.5.18.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-worker2.4.58-150600.5.18.1 · openSUSE:Leap 15.6Package registry (OSV)
red hat:httpd0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-debuginfo0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-debugsource0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-devel0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-filesystem0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-manual0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-tools0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-tools-debuginfo0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:mod_http20:1.15.7-8.module+el8.8.0+21773+20528f83.5 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)

+14

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×6

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2024-38475 —
Proof-of-concept repository on GitHubstars:172024-08-18
Proof-of-concept repository on GitHubstars:52024-12-12
Proof-of-concept repository on GitHubstars:02025-05-07
Proof-of-concept repository on GitHubstars:02025-05-09
Proof-of-concept repository on GitHubstars:02026-05-31
Proof-of-concept repository on GitHubstars:02026-10-17

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+47 d
  3. CISA KEV+303 d
  4. TodayNov 1, 2026+853 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-384730 days apartApache HTTP Server proxy encoding problem
    40Plan
  • CVE-2024-384740 days apartApache HTTP Server weakness with encoded question marks in backreferences
    40Plan

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-116 · Improper Encoding or Escaping of Output

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records