CVE-2018-20352
CVE-2018-20352 is a high-severity vulnerability in Cesanta Mongoose Embedded Web Server Library with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 3% (84th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-416
- Affected product: Cesanta Mongoose Embedded Web Server Library
- Published:
- Last modified:
Description
Use-after-free vulnerability in the mg_cgi_ev_handler function in mongoose.c in Cesanta Mongoose Embedded Web Server Library 6.13 and earlier allows a denial of service (application crash) or remote code execution.
Frequently asked questions
- What is CVE-2018-20352?
- Use-after-free vulnerability in the mg_cgi_ev_handler function in mongoose.c in Cesanta Mongoose Embedded Web Server Library 6.13 and earlier allows a denial of service (application crash) or remote code execution.
- How severe is CVE-2018-20352?
- CVE-2018-20352 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-20352 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-20352?
- CVE-2018-20352 affects Cesanta Mongoose Embedded Web Server Library. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-20352?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2018-20352 published?
- CVE-2018-20352 was published on 2019-06-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:cesanta:mongoose_embedded_web_server_library:*:*:*:*:*:*:*:*
More vulnerabilities in Cesanta Mongoose Embedded Web Server Library
- CVE-2017-11567 — High (CVSS 8.8): Cross-site request forgery (CSRF) vulnerability in Mongoose Web Server before 6.9 allows remote attackers to hijack the…
- CVE-2017-7185 — High (CVSS 7.5): Use-after-free vulnerability in the mg_http_multipart_wait_for_boundary function in mongoose.c in Cesanta Mongoose…
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- CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
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- CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
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