The Prime Mover plugin for WordPress before 2.2.1 contains a stored cross-site scripting vulnerability that allows attackers to execute arbitrary JavaScript by injecting an unescaped site_title value in a package's footprint.json file. Attackers can place a crafted package under the prime-mover-export-files directory so that the malicious value renders unescaped in the column_site_title() method of PrimeMoverBackupMenuListTable.php, triggering script execution in an administrator's browser when they view the Prime Mover Packages list table without needing to restore the package.
CVE-2026-101890
MEDIUMPre-NVD 5.45.4—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 5.4 from GitHub Security Advisory published 2026-10-01. A secondary CVSS source baseline 5.4; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.4Exploit: None knownExposed services: Not assessed
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
- CVSS v3
- 5.4
- EG Score
- 5.4MEDIUMhigh confidence
- EG Risk
- 24EG Risk 24/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity54% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at every mission impact level.Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix. - EPSS PROB
- 0.2%
- EPSS %ILE
- 4th
- KEV
- Not listed
CISA SSVCTrack at every mission impact level.
No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 1, 2026
Last Modified
October 2, 2026
Advisory Details (2)
Auto-updated Oct 1, 2026No patch confirmed yet.
generic
Prime Mover < 2.2.1 Stored XSS via Package Metadata | Advisories | VulnCheck
https://www.vulncheck.com/advisories/prime-mover-stored-xss-via-package-metadatageneric
Prime Mover – Backup and Migration – WordPress plugin | WordPress.org
https://wordpress.org/plugins/prime-mover/#developersVendor Advisories for CVE-2026-101890(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 13× in last 7d / 13× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-03 18:37 UTCGHSA enrichment
- 2026-10-02 18:16 UTCGHSA enrichment
- 2026-10-02 18:16 UTCGHSA enrichment
- 2026-10-02 18:15 UTCEG score recompute
- 2026-10-02 18:15 UTCGHSA enrichment
- 2026-10-01 21:58 UTCEG score recompute
- 2026-10-01 21:58 UTCGHSA enrichment
- 2026-10-01 19:22 UTCEG score recompute
- 2026-10-01 19:22 UTCGHSA enrichment
- 2026-10-01 18:23 UTCEG score recompute
- 2026-10-01 17:27 UTCEG score recompute
- 2026-10-01 16:27 UTCEG score recompute
- 2026-10-01 16:25 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-101890?
CVE-2026-101890 is a medium vulnerability published on October 1, 2026. The Prime Mover plugin for WordPress before 2.2.1 contains a stored cross-site scripting vulnerability that allows attackers to execute arbitrary JavaScript by injecting an unescaped sitetitle value in a package's footprint.json file. Attackers can place a crafted package under the…
When was CVE-2026-101890 disclosed?
CVE-2026-101890 was first published on October 1, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-101890 actively exploited?
CVE-2026-101890 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-101890?
CVE-2026-101890 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-101890?
No fix for CVE-2026-101890 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-101890 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-101890
Is Your Infrastructure Affected by CVE-2026-101890?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.