CVE-2026-103587: XSS (CVSS 5.4)

Description

QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office Hotel Reservation System Book Now search, where date_to and id_room_type parameters are copied into template variables without validation. Attackers can craft a malicious link containing JavaScript payload in these parameters that executes in an authenticated administrator's session when the victim follows the link.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

References

Other References

https://github.com/Qloapps/QloApps https://github.com/Qloapps/QloApps/blob/v1.7.0/modules/hotelreservationsystem/controllers/admin/AdminHotelRoomsBookingController.php https://github.com/Qloapps/QloApps/blob/v1.7.0/modules/hotelreservationsystem/views/templates/admin/hotel_rooms_booking/helpers/view/_partials/booking-rooms.tpl https://github.com/Qloapps/QloApps/commit/1d06fd302a935d68203dbdb341d89482621769d7 https://github.com/Qloapps/QloApps/pull/1884 https://hackmd.io/@leediay/four-reflected-xss-qloapps https://hackmd.io/@leediay/reflected-xss-qloapps-via-booking-now https://www.vulncheck.com/advisories/qloapps-through-1.7.0-reflected-xss-via-book-now-search-parameters https://hackmd.io/@leediay/four-reflected-xss-qloapps https://hackmd.io/@leediay/reflected-xss-qloapps-via-booking-now

Frequently Asked Questions

What is CVE-2026-103587? +

QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office Hotel Reservation System Book Now search, where date_to and id_room_type parameters are copied into template variables without validation. Attackers can craft a malicious link containing JavaScript payload in these parameters that executes in an authenticated administrator's session when the victim follows the link. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-103587? +

CVE-2026-103587 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-103587? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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