CVE-2020-1927: apache apache_http_server URL Redirection to Untrusted Site
Vulnerability summary
CVE-2020-1927 is a medium (CVSS 6.1) URL Redirection to Untrusted Site vulnerability in apache apache_http_server. EPSS estimates a 56.69% chance of exploitation in the next 30 days, higher than 99% of scored vulnerabilities.
Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 5Timeline
- 01-04-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
56.69%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
No change 0.00 pp
From 56.69% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Oracle7 products
- communications_element_manager8.1.1 | 8.2.0 | 8.2.1
- communications_session_report_manager8.1.1 | 8.2.0 | 8.2.1
- communications_session_route_manager8.1.1 | 8.2.0 | 8.2.1
- enterprise_manager_ops_center12.4.0.0
- instantis_enterprisetrack≥ 17.1, ≤ 17.3
Apache2 products
- apache_http_server2.4.0 to 2.4.41
- http_server≥ 2.4.0, ≤ 2.4.41
Debian2 products
- apache2< 2.4.43-1
- debian_linuxEOL9.0 | 10.0
Alpine1 product
- apache2< 2.4.43-r0
Broadcom1 product
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 20.04
Fedoraproject1 product
- fedoraEOL31 | 32
Netapp1 product
Opensuse1 product
- leapEOL15.1
Ubuntu1 product
- apache2All versions (No fix recorded) | < 2.4.18-2ubuntu3.17 | < 2.4.29-1ubuntu4.14 | < 2.4.41-4ubuntu3.1
10 vendors · 18 products
References
33 links- lists.opensuse.org/opensuse-security-announce/2020-05/msg00002.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 33 references
- lists.debian.org/debian-lts-announce/2021/07/msg00006.htmlMailing ListX Refsource MLISTThird Party Advisory
- www.oracle.com/security-alerts/cpujul2022.htmlX Refsource MISC