CVE-2025-53020: apache software foundation apache http server
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2025-53020RHSA-2026:22528RHSA-2026:22551UBUNTU-CVE-2025-53020DEBIAN-CVE-2025-53020
Published 10-07-2025Last modified 04-11-2025
Vulnerability summary
CVE-2025-53020 is a high (CVSS 7.5) vulnerability in apache software foundation apache http server. EPSS estimates a 4.96% chance of exploitation in the next 30 days, higher than 92% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
4.96%
0%100%
Low · +0.16 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 20 · Related 9DLA-4270-1MGASA-2025-0301OPENSUSE-SU-2025:15360-1RHSA-2026:22140RHSA-2026:27200RHSA-2026:36373RHSA-2026:36831RHSA-2026:36846RHSA-2026:50538RHSA-2026:50572RHSA-2026:55930RHSA-2026:55992SUSE-SU-2025:02565-1SUSE-SU-2025:02682-1SUSE-SU-2025:02683-1SUSE-SU-2025:02684-1SUSE-SU-2025:02685-1SUSE-SU-2026:2686-1USN-7639-1USN-7639-2
Timeline
- 10-07-2025PublishedVulnerability first disclosed.
- 04-11-2025Last modifiedVulnerability information updated.
Description
Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: from 2.4.17 up to 2.4.63. Users are recommended to upgrade to version 2.4.64, which fixes the issue.
CVSS metrics
6 scores · 6 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSources6 sources · 5.3–7.5
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · Red hatEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
4.96%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
+0.16 pp
From 4.80% on 18-09-2026
18-09-202618-10-2026
EPSS score4.96%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat3 products
- mod_http2< 0:2.0.29-4.el10_2 | < 0:2.0.26-6.el9_8
- mod_http2-debuginfo< 0:2.0.29-4.el10_2 | < 0:2.0.26-6.el9_8
- mod_http2-debugsource< 0:2.0.29-4.el10_2 | < 0:2.0.26-6.el9_8
Alpine1 product
- apache2< 2.4.64-r0
Apache1 product
- http_server≥ 2.4.17, < 2.4.64
Apache software foundation1 product
- apache http server≥ 2.4.17, ≤ 2.4.63
Debian1 product
- apache2< 2.4.65-1~deb12u1 | < 2.4.64-1
Ubuntu1 product
- apache2< 2.4.18-2ubuntu3.17+esm16 | < 2.4.29-1ubuntu4.27+esm6 | < 2.4.41-4ubuntu3.23+esm2 | < 2.4.52-1ubuntu4.15 | < 2.4.58-1ubuntu8.7
6 vendors · 8 products
