QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office room type editor's length of stay fields. Attackers can induce authenticated administrators to submit crafted POST requests with malicious payloads in restriction_min_los and restriction_max_los parameters, executing arbitrary JavaScript in the victim's administrative session.
CVE-2026-103590
MEDIUMPre-NVD 5.45.4—Trending — 4 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
An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.
- 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: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release. - EPSS PROB
- 0.2%
- EPSS %ILE
- 7th
- KEV
- Not listed
CISA SSVCTrack at every mission impact level.
An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
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
September 30, 2026
Last Modified
October 1, 2026
Advisory Details (6)
Auto-updated Oct 1, 2026Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic
QloApps through 1.7.0 Reflected XSS via Length of Stay Fields | Advisories | VulnCheck
https://www.vulncheck.com/advisories/qloapps-through-1.7.0-reflected-xss-via-length-of-stay-fieldsgeneric
GitHub - Qloapps/QloApps: QloApps is a Free and Open-source hotel management and reservation system to take a hotel business online. QloApps offers a Property Management System (PMS), a Booking Engine, and an attractive Hotel Website. Elevate hotel operations with QloApps to streamline processes and provide an enhanced experience for both hoteliers and guests. · GitHub
https://github.com/Qloapps/QloAppsgeneric
CVE-2026-103587, CVE-2026-103588, CVE-2026-103589, CVE-2026-103590 Reflected XSS in QloApps 1.7.0 - HackMD
https://hackmd.io/@leediay/four-reflected-xss-qloappsgeneric
QloApps/admin/themes/default/template/controllers/products/lengthofstay.tpl at v1.7.0 · Qloapps/QloApps · GitHub
https://github.com/Qloapps/QloApps/blob/v1.7.0/admin/themes/default/template/controllers/products/lengthofstay.tplgithub_commit
commit 7ed467d91108 (Qloapps/QloApps)
Fix landed in Qloapps/QloApps commit 7ed467d91108 — awaiting tagged release
https://github.com/Qloapps/QloApps/commit/7ed467d911086b190180d7f297e3b15ba31e82d5github_pr
Fixed: Implement input validation across back office forms and templates
Upstream fix in progress (PR #1899 · Qloapps/QloApps, state=open)
https://github.com/Qloapps/QloApps/pull/1899Vendor Advisories for CVE-2026-103590(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 10× in last 7d / 10× 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 16:44 UTCEG score recompute
- 2026-10-03 16:44 UTCGHSA enrichment
- 2026-10-03 14:25 UTCEPSS rescore
- 2026-10-02 16:03 UTCGHSA enrichment
- 2026-10-01 15:23 UTCEG score recompute
- 2026-10-01 15:23 UTCGHSA enrichment
- 2026-10-01 14:42 UTCEG score recompute
- 2026-10-01 14:42 UTCGHSA enrichment
- 2026-09-30 23:18 UTCEG score recompute
- 2026-09-30 23:15 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-103590?
CVE-2026-103590 is a medium vulnerability published on September 30, 2026. QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office room type editor's length of stay fields. Attackers can induce authenticated administrators to submit crafted POST requests with malicious payloads in restrictionminlos and restrictionmaxlos parameters,…
When was CVE-2026-103590 disclosed?
CVE-2026-103590 was first published on September 30, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103590 actively exploited?
CVE-2026-103590 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103590?
CVE-2026-103590 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-2026-103590?
An upstream fix for CVE-2026-103590 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-103590 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-103590
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