How severe is CVE-2023-48839?

CVE-2023-48839 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-48839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-48839?

CVE-2023-48839 affects Phpjabbers Appointment Scheduler. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-48839?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-48839 published?

CVE-2023-48839 was published on 2023-12-07 and last updated on 2026-06-17.

CVE-2023-48839

CVE-2023-48839 is a medium-severity vulnerability in Phpjabbers Appointment Scheduler with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Phpjabbers Appointment Scheduler
Published: 2023-12-07
Last modified: 2026-06-17

Description

Appointment Scheduler 3.0 is vulnerable to Multiple Stored Cross-Site Scripting (XSS) issues via the name, plugin_sms_api_key, plugin_sms_country_code, calendar_id, title, country name, or customer_name parameter.

Frequently asked questions

What is CVE-2023-48839?: Appointment Scheduler 3.0 is vulnerable to Multiple Stored Cross-Site Scripting (XSS) issues via the name, plugin_sms_api_key, plugin_sms_country_code, calendar_id, title, country name, or customer_name parameter.
How severe is CVE-2023-48839?: CVE-2023-48839 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-48839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-48839?: CVE-2023-48839 affects Phpjabbers Appointment Scheduler. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-48839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-48839 published?: CVE-2023-48839 was published on 2023-12-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpjabbers:appointment_scheduler:3.0:*:*:*:*:*:*:*

More vulnerabilities in Phpjabbers Appointment Scheduler

CVE-2023-48841 — High (CVSS 8.8): Appointment Scheduler 3.0 is vulnerable to CSV Injection via a Language > Labels > Export action.
CVE-2023-48840 — High (CVSS 7.5): A lack of rate limiting in pjActionAjaxSend in Appointment Scheduler 3.0 allows attackers to cause resource exhaustion.
CVE-2023-36127 — High (CVSS 7.5): User enumeration is found in in PHPJabbers Appointment Scheduler 3.0. This issue occurs during password recovery, where…
CVE-2014-10001 — Medium (CVSS 6.8): Multiple cross-site request forgery (CSRF) vulnerabilities in PHPJabbers Appointment Scheduler 2.0 allow remote…
CVE-2023-36126 — Medium (CVSS 6.1): There is a Cross Site Scripting (XSS) vulnerability in the "theme" parameter of preview.php in PHPJabbers Appointment…
CVE-2023-48838 — Medium (CVSS 5.4): Appointment Scheduler 3.0 is vulnerable to Multiple HTML Injection issues via the SMS API Key or Default Country Code.

All CVEs affecting Phpjabbers Appointment Scheduler →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →