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No exploitation reportedFix available

CVE-2020-1927

No exploitation reported by the sources we read.

  • Published2020-04-02
  • WeaknessCWE-601

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an an unexpected URL within the request URL.

Timeline

dates in UTC
  1. 2020-04-0200:15CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Versions per branch

NVD
Apache HTTP Server
BranchAffectedFixed in
2.4≥ 2.4.0, ≤ 2.4.41no fix published
Canonical ubuntu linux
BranchAffectedFixed in
16.4= 16.04no fix published
18.4= 18.04no fix published
20.4= 20.04no fix published
Oracle communications element manager
BranchAffectedFixed in
8.1= 8.1.1no fix published
8.2= 8.2.0no fix published
8.2= 8.2.1no fix published

12 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • apacheMageia:7all versions · fixed in 2.4.43-1.mga7
  • apache2Ubuntu:Pro:14.04:LTSall versions · no fixed version listed
  • apache2Ubuntu:20.04:LTSall versions · fixed in 2.4.41-4ubuntu3.1
  • apache2Ubuntu:18.04:LTSall versions · fixed in 2.4.29-1ubuntu4.14
  • apache2Ubuntu:16.04:LTSall versions · fixed in 2.4.18-2ubuntu3.17
  • apache2SUSE:OpenStack Cloud Crowbar 8all versions · fixed in 2.4.23-29.54.1
  • apache2SUSE:OpenStack Cloud 8all versions · fixed in 2.4.23-29.54.1
  • apache2SUSE:OpenStack Cloud 7all versions · fixed in 2.4.23-29.54.1

81 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-1927 Red Hat Product Security386 products fixed

    httpd: mod_rewrite configurations vulnerable to open redirect

  • RHSA-2020:4751 Red Hat Product Security85 products fixed

    Red Hat Security Advisory: httpd:2.4 security, bug fix, and enhancement update

  • RHSA-2020:3958 Red Hat Product Security69 products fixed

    Red Hat Security Advisory: httpd security, bug fix, and enhancement update

  • RHSA-2020:2263 Red Hat Product Security142 products fixed

    Red Hat Security Advisory: httpd24-httpd and httpd24-mod_md security and enhancement update

  • RHSA-2020:1337 Red Hat Product Security89 products fixed

    Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP2 security update

  • RHSA-2020:1336 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP2 security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2020:4751 · 85 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the httpd daemon will be restarted automatically.
  2. Vendor fix Red Hat Product Security RHSA-2020:1337 · 89 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2020:1336 · 1 productThe References section of this erratum contains a download link (you must log in to download the update). Before applying the update, back up your existing Red Hat JBoss Core Services installation (including all applications and configuration files).

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.16.1read 2026-10-23
  • NVDCVSS 2.05.8read 2026-10-23
  • CNAweakness (CWE)CWE-601known since 2026-10-23
  • NVDweakness (CWE)CWE-601read 2026-10-23
  • FIRST EPSSEPSS score56.7 %read 2026-11-10
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published
2020-04-02
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h8gj-rgqf-fpq3

Frequently asked questions

What is CVE-2020-1927?

In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an an unexpected URL within the request URL.

Is CVE-2020-1927 actively exploited?

Active exploitation of CVE-2020-1927 has not been confirmed. Its EPSS score was 56.7% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-1927?

CVE-2020-1927 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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