How severe is CVE-2018-1000658?

CVE-2018-1000658 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-1000658 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000658?

CVE-2018-1000658 affects Limesurvey. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000658?

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-2018-1000658 published?

CVE-2018-1000658 was published on 2018-09-06 and last updated on 2026-06-17.

CVE-2018-1000658

CVE-2018-1000658 is a high-severity vulnerability in Limesurvey 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-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Limesurvey
Published: 2018-09-06
Last modified: 2026-06-17

Description

LimeSurvey version prior to 3.14.4 contains a file upload vulnerability in upload functionality that can result in an attacker gaining code execution via webshell. This attack appear to be exploitable via an authenticated user uploading a zip archive which can contains malicious php files that can be called under certain circumstances. This vulnerability appears to have been fixed in after commit 91d143230eb357260a19c8424b3005deb49a47f7 / version 3.14.4.

Frequently asked questions

What is CVE-2018-1000658?: LimeSurvey version prior to 3.14.4 contains a file upload vulnerability in upload functionality that can result in an attacker gaining code execution via webshell. This attack appear to be exploitable via an authenticated user uploading a zip archive which can contains malicious php files that can be called under certain circumstances. This vulnerability appears to have been fixed in after commit 91d143230eb357260a19c8424b3005deb49a47f7 / version 3.14.4.
How severe is CVE-2018-1000658?: CVE-2018-1000658 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-1000658 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000658?: CVE-2018-1000658 affects Limesurvey. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000658?: 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-2018-1000658 published?: CVE-2018-1000658 was published on 2018-09-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:limesurvey:limesurvey:*:*:*:*:*:*:*:*

More vulnerabilities in Limesurvey

CVE-2025-56422 — Critical (CVSS 9.8): A deserialization vulnerability in LimeSurvey before v6.15.0+250623 allows a remote attacker to execute arbitrary code…
CVE-2025-41375 — Critical (CVSS 9.8): SQL Injection vulnerability in Limesurvey v2.65.1+170522. This vulnerability allows an attacker to retrieve, create,…
CVE-2022-48008 — Critical (CVSS 9.8): An arbitrary file upload vulnerability in the plugin manager of LimeSurvey v5.4.15 allows attackers to execute…
CVE-2019-25019 — Critical (CVSS 9.8): LimeSurvey before 4.0.0-RC4 allows SQL injection via the participant model.
CVE-2020-11455 — Critical (CVSS 9.8): LimeSurvey before 4.1.12+200324 contains a path traversal vulnerability in…
CVE-2019-16184 — Critical (CVSS 9.8): A CSV injection vulnerability was found in Limesurvey before 3.17.14 that allows survey participants to inject commands…

All CVEs affecting Limesurvey →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →