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Vulnerability record · CVE-2017-10840 · published 29 August 2017

CVE-2017-10840: Webcalendar project webcalendar cross-site scripting vulnerability

WWebcalendar Project · Webcalendar

Cross-site scripting vulnerability in WebCalendar 1.2.7 and earlier allows an attacker to inject arbitrary web script or HTML via unspecified vectors.

6.1 CVSS 3.0 Medium EPSS 0.93% · top 40.8% CWE-79 · Cross-site scripting
6.1CVSS 3.0 base score, v2 4.3
0.93%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Cross-site scripting vulnerability in WebCalendar 1.2.7 and earlier allows an attacker to inject arbitrary web script or HTML via unspecified vectors.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/craigk5n/webcalendar/releases/tag/v1.2.8 Issue TrackingPatchThird Party Advisory
https://jvn.jp/en/jp/JVN23340457/index.html Third Party AdvisoryVDB Entry
https://github.com/craigk5n/webcalendar/releases/tag/v1.2.8 Issue TrackingPatchThird Party Advisory
https://jvn.jp/en/jp/JVN23340457/index.html Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2012-1495WebCalendar install/index.php pre-auth remote code executionWebCalendar before 1.2.5 passes the form_single_user_login parameter in install/index.php without adequate sanitisation, allowing injection that lead…EPSS 80%analysed8.8CVE-2012-1496Webcalendar project webcalendar injection vulnerabilityLocal file inclusion in WebCalendar before 1.2.5.EPSS 2.5%7.5CVE-2012-5385Webcalendar project webcalendar permissions and access controls vulnerabilityinstall/index.php in Craig Knudsen WebCalendar before 1.2.5 allows remote attackers to modify settings.php and possibly execute arbitrary code via ve…EPSS 2.2%6.1CVE-2024-22635Webcalendar project webcalendar cross-site scripting vulnerabilityWebCalendar v1.3.0 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the component /WebCalendarvqsmnseug2/edit_entry…EPSS 0.46%5.4CVE-2023-0289Webcalendar project webcalendar cross-site scripting vulnerabilityCross-site Scripting (XSS) - Stored in GitHub repository craigk5n/webcalendar prior to master.EPSS 0.53%5.3CVE-2013-1422Webcalendar project webcalendar observable discrepancy vulnerabilitywebcalendar before 1.2.7 shows the reason for a failed login (e.g., "no such user").EPSS 1.6%4.9CVE-2017-10841Webcalendar project webcalendar path traversal vulnerabilityDirectory traversal vulnerability in WebCalendar 1.2.7 and earlier allows authenticated attackers to read arbitrary files via unspecified vectors.EPSS 2.4%4.3CVE-2013-1421Webcalendar project webcalendar cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in Craig Knudsen WebCalendar before 1.2.5, 1.2.6, and other versions before 1.2.7 allows remote attackers to…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2017-10840), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.