CVE-2018-25103: lighttpd
CVSS: 5.3v3.1MediumDeferred
AliasesUBUNTU-CVE-2018-25103DEBIAN-CVE-2018-25103
Published 17-06-2024Last modified 15-09-2025
Vulnerability summary
CVE-2018-25103 is a medium (CVSS 5.3) vulnerability in lighttpd. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 50.9% of scored vulnerabilities.
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)EPSS score
0.67%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 17-06-2024PublishedVulnerability first disclosed.
- 15-09-2025Last modifiedVulnerability information updated.
Description
There exists use-after-free vulnerabilities in lighttpd <= 1.4.50 request parsing which might read from invalid pointers to memory used in the same request, not from other requests.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 5.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NSourcesAll 4 agree
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.67%
Chance of exploitation in the next 30 days
Percentile
51%
Versus all other CVEs
30-day change
0.00 pp
From 0.67% on 18-09-2026
18-09-202618-10-2026
EPSS score0.67%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Debian1 product
- lighttpd< 1.4.52-1
Lighttpd1 product
- lighttpd≤ 1.4.50
Ubuntu1 product
- lighttpdAll versions (No fix recorded)
3 vendors · 3 products
