How severe is CVE-2017-5963?

CVE-2017-5963 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-2017-5963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-5963?

CVE-2017-5963 primarily affects Caddy Project Caddy. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-5963?

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

When was CVE-2017-5963 published?

CVE-2017-5963 was published on 2017-02-12 and last updated on 2026-06-17.

CVE-2017-5963

CVE-2017-5963 is a medium-severity vulnerability in Caddy Project Caddy 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)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Caddy Project Caddy
Published: 2017-02-12
Last modified: 2026-06-17

Description

An issue was discovered in caddy (for TYPO3) before 7.2.10. The vulnerability exists due to insufficient filtration of user-supplied data in the "paymillToken" HTTP POST parameter passed to the "caddy/Resources/Public/JavaScript/e-payment/paymill/api/php/payment.php" URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.

Frequently asked questions

What is CVE-2017-5963?: An issue was discovered in caddy (for TYPO3) before 7.2.10. The vulnerability exists due to insufficient filtration of user-supplied data in the "paymillToken" HTTP POST parameter passed to the "caddy/Resources/Public/JavaScript/e-payment/paymill/api/php/payment.php" URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.
How severe is CVE-2017-5963?: CVE-2017-5963 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-2017-5963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-5963?: CVE-2017-5963 primarily affects Caddy Project Caddy. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-5963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-5963 published?: CVE-2017-5963 was published on 2017-02-12 and last updated on 2026-06-17.

References

Affected products (22)

cpe:2.3:a:caddy_project:caddy:2.1.4:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:2.1.5:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:2.1.6:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:3.0.0:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:4.0.0:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:4.0.1:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:4.0.2:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:4.0.3:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:4.0.12:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.0.1:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.0.2:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.0.9:alpha:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.0.12:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.0.14:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.1.0:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.2.1:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.3.0:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.3.1:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:6.3.3:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:7.0.0:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:7.1.0:beta:*:*:*:typo3:*:*
cpe:2.3:a:caddy_project:caddy:7.2.7:beta:*:*:*:typo3:*:*

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