Security readout for executives and security teams
Plain-English summary
CVE-2026-31313 is a stored cross-site scripting issue in Feehi CMS v2.1.1. A logged-in user with content creation or editing access can save malicious script in the Content field. When another user views that content, the script may run in their browser, risking account or data exposure within the CMS context.
Executive priority
Treat as a moderate priority. It is not reported as exploited, but it can affect administrative trust and user sessions if lower-privileged CMS accounts are compromised or abused. Prioritize if Feehi CMS allows multiple authors or external contributors.
Technical view
The CVE describes authenticated stored XSS in the Feehi CMS creation/editing module via the Content field. CVSS 3.1 is 5.4, with network access, low complexity, low privileges, required user interaction, changed scope, and low confidentiality/integrity impact. CWE-79 applies. Public data does not identify a confirmed patched version.
Likely exposure
Exposure is likely limited to Feehi CMS v2.1.1 instances where untrusted or lower-privileged users can create or edit content that other users view.
Exploitation context
The source bundle does not indicate active exploitation, and CISA KEV status is false. Exploitation requires authentication and a victim viewing affected stored content. Impact is mainly browser-side script execution, potentially affecting CMS sessions or displayed content integrity.
Researcher notes
Available evidence is limited to the CVE description and linked GitHub issue. The affected product field in the CVE data is not normalized, but the description names Feehi CMS v2.1.1. No official patch version is present in the provided sources.
Mitigation direction
- Check the Feehi CMS project issue and vendor guidance for an official fix or upgrade path.
- Restrict content creation and editing privileges to trusted users only.
- Review and remove suspicious scripts or HTML from existing Content fields.
- Apply output encoding and input sanitization if maintaining a custom deployment.
- Use session protections and least-privilege roles to reduce XSS impact.
Validation and detection
- Inventory Feehi CMS deployments and identify any running v2.1.1.
- Confirm which roles can access the creation/editing module.
- Review stored content for unexpected script or HTML patterns.
- Test in a non-production environment using safe XSS validation strings.
- Monitor project issue CVE-2026-31313 / GitHub issue 80 for remediation updates.
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.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-31313 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
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/liufee/cms/issues/80CVE reference, mitre
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.