CVE-2018-25011

A heap-based buffer overflow was found in libwebp in versions before 1.0.1 in PutLE16().

Published: 2021-05-21 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-25011 is rated Moderate Risk (59.2/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.38%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-25011

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.84% 0.38% -0.47%
2 2025-11-18 0.41% 0.84% +0.43%
3 2025-08-24 — 0.41% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-25011

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2018-25011

OS Trackers for CVE-2018-25011

vendor priority summary link
debian not yet assigned CVE-2018-25011 not yet assigned priority: Debian including 1 source packages (libwebp), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-25011
redhat high — https://access.redhat.com/security/cve/CVE-2018-25011
suse critical CVE-2018-25011 severity critical: SUSE including 261 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 437 product×package rows across 55 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (55 product lines)): Known Affected 231, Fixed 199, Known Not Affected 7. https://www.suse.com/security/cve/CVE-2018-25011/
ubuntu medium CVE-2018-25011 medium priority: Ubuntu including 1 source packages (libwebp), 9 status rows across 9 suites (bionic, focal, groovy, hirsute, impish, jammy, trusty, upstream, xenial): released 8, needs-triage 1. https://ubuntu.com/security/CVE-2018-25011

Affected software / configurations for CVE-2018-25011

Vendor Product Version Raw CPE
webmproject libwebp < 1.0.1 cpe:2.3:a:webmproject:libwebp:*:*:*:*:*:*:*:*
redhat enterprise_linux 7.0 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

References for CVE-2018-25011

cvelogic Threat Intelligence