How severe is CVE-2023-40755?

CVE-2023-40755 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-40755 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40755?

CVE-2023-40755 affects Phpjabbers Callback Widget. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40755?

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

When was CVE-2023-40755 published?

CVE-2023-40755 was published on 2023-08-28 and last updated on 2026-06-17.

CVE-2023-40755

CVE-2023-40755 is a medium-severity vulnerability in Phpjabbers Callback Widget with a CVSS 3.x base score of 6.1. 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 6.1)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Phpjabbers Callback Widget
Published: 2023-08-28
Last modified: 2026-06-17

Description

There is a Cross Site Scripting (XSS) vulnerability in the "theme" parameter of preview.php in PHPJabbers Callback Widget v1.0.

Frequently asked questions

What is CVE-2023-40755?: There is a Cross Site Scripting (XSS) vulnerability in the "theme" parameter of preview.php in PHPJabbers Callback Widget v1.0.
How severe is CVE-2023-40755?: CVE-2023-40755 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-40755 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40755?: CVE-2023-40755 affects Phpjabbers Callback Widget. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40755?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-40755 published?: CVE-2023-40755 was published on 2023-08-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpjabbers:callback_widget:1.0:*:*:*:*:*:*:*

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