Security readout for executives and security teams
Plain-English summary
Yordam Library Information Document Automation before version 19.02 has an unauthenticated reflected cross-site scripting issue. An attacker would need a user to interact with crafted content, but successful abuse could expose limited information in the user's browser context. The provided sources do not show confirmed active exploitation.
Executive priority
Treat as a moderate-priority web application remediation. Prioritize internet-facing library portals and shared public workstations, but do not treat it as emergency-level unless local exposure or threat intelligence changes.
Technical view
CVE-2021-45476 is CWE-79 reflected XSS in Yordam Library Information Document Automation Program before 19.02. CVSS 3.1 is 4.7: network-accessible, low complexity, no privileges, user interaction required, changed scope, low confidentiality impact, no integrity or availability impact.
Likely exposure
Exposure is most likely for libraries or institutions running internet-accessible Yordam Library Information Document Automation instances below version 19.02. The source bundle does not provide CPEs, endpoint details, or precise affected build ranges beyond before 19.02.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. The attack requires user interaction, so business risk centers on phishing-style browser exposure rather than direct system takeover.
Researcher notes
Evidence is limited to the CVE record and Turkish government advisory references. The bundle marks one USOM link as broken. No CPEs, endpoint names, exploit details, or active exploitation evidence are provided, so validation should focus on version and exposure confirmation.
Mitigation direction
- Inventory Yordam Library Information Document Automation deployments and identify versions.
- Upgrade affected deployments to version 19.02 or later where applicable.
- Review TR-22-0669 and vendor guidance for product-specific remediation.
- Restrict public access to affected systems where operationally feasible.
- Monitor for vendor updates if version or fix details remain unclear.
Validation and detection
- Confirm whether any deployment is below version 19.02.
- Check whether affected instances are reachable from the internet.
- Review application logs for suspicious requests to Yordam web interfaces.
- Use only authorized, non-destructive XSS validation in a test environment.
- Document affected status, remediation date, and remaining exceptions.
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-2021-45476 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
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/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:N/UI:R/S:C/C:L/I:N/A:N2.81.4TR-CERTVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/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://www.usom.gov.tr/bildirim/tr-22-0669CVE reference, TR-CERT · government-resource, broken-link
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-22-0669CVE reference, TR-CERT · government-resource
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.