Security readout for executives and security teams
Plain-English summary
This issue affects the WordPress NextGen GalleryView plugin up to version 0.5.5. It is a reflected cross-site scripting flaw, meaning a crafted link could run script in a victim's browser after interaction. The CVE rates it high, but the provided sources do not show active exploitation or a named fix.
Executive priority
Treat this as a high-priority WordPress hygiene item where the plugin is present on public sites. It is not KEV-listed in the provided data, but XSS in WordPress plugins can create brand, account, and content integrity risk.
Technical view
CVE-2023-35098 is an unauthenticated reflected XSS vulnerability in John Brien's WordPress NextGen GalleryView plugin <= 0.5.5. CVSS 3.1 is 7.1 with network attack vector, low complexity, no privileges, and required user interaction. Scope is changed with low confidentiality, integrity, and availability impact.
Likely exposure
Likely exposure is limited to WordPress sites running John Brien NextGen GalleryView version 0.5.5 or earlier. The source bundle does not provide install counts, fixed versions, CPEs, or deployment indicators, so exposure must be confirmed from site inventories.
Exploitation context
The flaw is remotely reachable and unauthenticated, but exploitation requires user interaction. The bundle marks CISA KEV as false, and the cited sources do not state that exploitation is active in the wild.
Researcher notes
Evidence supports CWE-79 reflected XSS and CVSS 7.1. Affected scope is described as <=0.5.5, but the bundle lacks exploit details, fixed-version data, and independent exploitation confirmation. Avoid assuming compromise without asset and log evidence.
Mitigation direction
- Inventory WordPress sites for the NextGen GalleryView plugin.
- Confirm whether any installed version is 0.5.5 or earlier.
- Check vendor, CVE, and Patchstack guidance for a fixed release or official mitigation.
- Disable or remove the plugin where risk outweighs business need.
- Prioritize administrative session protections and WordPress hardening until resolved.
Validation and detection
- Verify installed plugin name and version on each WordPress site.
- Confirm whether exposed sites are internet-facing or restricted.
- Review logs for unusual requests involving affected plugin functionality.
- After mitigation, confirm the plugin is removed, disabled, or updated per vendor guidance.
- Record affected assets, decisions, and residual risk.
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-2023-35098 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
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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:N/UI:R/S:C/C:L/I:L/A:L2.83.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source materials
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.