How severe is CVE-2018-16956?

CVE-2018-16956 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-16956 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16956?

CVE-2018-16956 affects Oracle Webcenter Interaction. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16956?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-16956 published?

CVE-2018-16956 was published on 2018-09-18 and last updated on 2026-06-17.

CVE-2018-16956

CVE-2018-16956 is a medium-severity vulnerability in Oracle Webcenter Interaction with a CVSS 3.x base score of 6.5. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Oracle Webcenter Interaction
Published: 2018-09-18
Last modified: 2026-06-17

Description

The AjaxControl component of Oracle WebCenter Interaction Portal 10.3.3 does not validate the names of pages when processing page rename requests. Pages can be renamed to include characters unsupported for URIs by the web server hosting the WCI Portal software (such as IIS). Renaming pages to include unsupported characters, such as 0x7f, prevents these pages from being accessed over the web server, causing a Denial of Service (DoS) to the page. NOTE: this CVE is assigned by MITRE and isn't validated by Oracle because Oracle WebCenter Interaction Portal is out of support.

Frequently asked questions

What is CVE-2018-16956?: The AjaxControl component of Oracle WebCenter Interaction Portal 10.3.3 does not validate the names of pages when processing page rename requests. Pages can be renamed to include characters unsupported for URIs by the web server hosting the WCI Portal software (such as IIS). Renaming pages to include unsupported characters, such as 0x7f, prevents these pages from being accessed over the web server, causing a Denial of Service (DoS) to the page. NOTE: this CVE is assigned by MITRE and isn't validated by Oracle because Oracle WebCenter Interaction Portal is out of support.
How severe is CVE-2018-16956?: CVE-2018-16956 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-16956 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16956?: CVE-2018-16956 affects Oracle Webcenter Interaction. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16956?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-16956 published?: CVE-2018-16956 was published on 2018-09-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oracle:webcenter_interaction:10.3.3:*:*:*:*:*:*:*

More vulnerabilities in Oracle Webcenter Interaction

CVE-2018-16957 — Critical (CVSS 9.8): The Oracle WebCenter Interaction 10.3.3 search service queryd.exe binary is compiled with the i1g2s3c4 hardcoded…
CVE-2018-16952 — High (CVSS 8.8): The Oracle WebCenter Interaction Portal 10.3.3 does not implement protection against Cross-site Request Forgery in its…
CVE-2018-16955 — Medium (CVSS 6.1): The login function of Oracle WebCenter Interaction Portal 10.3.3 is vulnerable to reflected cross-site scripting (XSS).…
CVE-2018-16954 — Medium (CVSS 6.1): An issue was discovered in Oracle WebCenter Interaction Portal 10.3.3. The login function of the portal is vulnerable…
CVE-2018-16953 — Medium (CVSS 6.1): The AjaxView::DisplayResponse() function of the portalpages.dll assembly in Oracle WebCenter Interaction Portal 10.3.3…
CVE-2018-16958 — Medium (CVSS 5.4): An issue was discovered in Oracle WebCenter Interaction Portal 10.3.3. The ASP.NET_SessionID primary session cookie,…

All CVEs affecting Oracle Webcenter Interaction →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →