Security readout for executives and security teams
Plain-English summary
CVE-2018-11118 is a cross-site scripting issue in the ILIAS RSS subsystem. Affected systems are ILIAS 5.1.x, 5.2.x, and 5.3.x before 5.3.5. Successful abuse could let attacker-controlled script run in a user's browser in the application's trust context.
Executive priority
Prioritize remediation for internet-accessible or broadly used ILIAS portals. The issue is not listed as known exploited in the provided data, but XSS in learning platforms can affect user sessions and trust.
Technical view
The CVE describes XSS reachable through a URI handled by Services/Feeds/classes/class.ilExternalFeedItem.php in ILIAS. Public source data names affected branches and references upstream commits plus an ILIAS documentation page, but provides no CVSS score, CWE, exploit details, or active exploitation evidence.
Likely exposure
Exposure is most likely for organizations still running ILIAS 5.1.x, 5.2.x, or 5.3.x before 5.3.5, especially where RSS or external feed functionality is enabled or reachable by users.
Exploitation context
The provided sources support an XSS condition in the RSS subsystem. CISA KEV is false in the bundle, and no cited source states active exploitation. Treat exploit status as unconfirmed.
Researcher notes
Evidence is limited to the CVE description and upstream references. No CVSS, CWE, affected CPEs, exploit maturity, or detailed advisory text is provided in the bundle, so validation should focus on version, feature exposure, and vendor-confirmed fixes.
Mitigation direction
- Upgrade affected ILIAS 5.3.x installations to 5.3.5 or later.
- Check ILIAS vendor guidance for supported fixes on 5.1.x and 5.2.x.
- Limit untrusted RSS or external feed use until patched.
- Review referenced upstream commits before maintaining any local backport.
- Monitor application logs for unusual RSS or feed-related requests.
Validation and detection
- Inventory ILIAS installations and record exact version branches.
- Confirm whether RSS or external feed functionality is enabled.
- Verify patched systems are at ILIAS 5.3.5 or later where applicable.
- Review change history against the two referenced upstream commits.
- Check whether any compensating controls restrict feed-related endpoints.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-11118 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ILIAS-eLearning/ILIAS/commit/d0dcad1b1e729f694acd0582bc626c7c8e62b519CVE reference · x_refsource_MISC
- https://github.com/ILIAS-eLearning/ILIAS/commit/6b2217c31b6974788a5c787413454475687b44bbCVE reference · x_refsource_MISC
- https://www.ilias.de/docu/goto.php?target=st_229CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.