Security readout for executives and security teams
Plain-English summary
CVE-2021-45479 is a stored cross-site scripting issue in Yordam Library Automation System before 19.2. A logged-in user could store unsafe input that later runs in another user’s browser when viewed. Business impact is mainly account-context data exposure or unauthorized actions within the application, not direct server takeover.
Executive priority
Treat as a moderate web-application risk. Prioritize remediation where the system is externally reachable or used by many staff and patrons. It is not presented as actively exploited in the provided evidence, but stored XSS can undermine trust and user-session integrity.
Technical view
The vulnerability is CWE-79 improper neutralization during web page generation. CVSS 3.1 score is 5.4: network reachable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact. Sources identify Yordam Library Automation System before 19.2 as affected.
Likely exposure
Organizations running Yordam Library Automation System versions before 19.2 have potential exposure, especially where staff or patrons can create stored records or fields viewed by other users. The bundle does not provide CPEs or deployment prevalence.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source claims active exploitation. Exploitation would require low privileges and another user viewing affected stored content. Evidence is limited to public advisory metadata and government references.
Researcher notes
The source bundle gives limited product-version detail: description says before 19.2, while the affected object lists version 0 and no CPEs. Do not broaden affected products without vendor confirmation. The USOM link is marked broken; the siberguvenlik.gov.tr advisory is the stronger government reference.
Mitigation direction
- Inventory Yordam Library Automation System deployments and confirm exact versions.
- Move off versions before 19.2 after confirming vendor guidance.
- Review vendor and Turkish government advisory pages for official remediation details.
- Restrict write access to stored content fields until remediation is complete.
- Monitor for unexpected script-like content in records or user-controlled fields.
Validation and detection
- Confirm no production instance reports a version earlier than 19.2.
- Identify roles that can create content later viewed by other users.
- Review stored records for suspicious HTML or script-like entries.
- Check whether vendor guidance lists specific fixed releases or configuration changes.
- Prioritize validation on internet-accessible or broadly user-accessible deployments.
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-2021-45479 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.
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:N2.32.7TR-CERTVulnerability 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://www.usom.gov.tr/bildirim/tr-23-0119CVE reference, TR-CERT · government-resource, broken-link
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0119CVE 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.
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.