How severe is CVE-2023-40599?

CVE-2023-40599 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-40599 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40599?

CVE-2023-40599 affects Synck Graphica Mailform Pro Cgi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40599?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-40599 published?

CVE-2023-40599 was published on 2023-08-25 and last updated on 2026-06-17.

CVE-2023-40599

CVE-2023-40599 is a high-severity vulnerability in Synck Graphica Mailform Pro Cgi with a CVSS 3.x base score of 7.5. 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-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1333
Affected product: Synck Graphica Mailform Pro Cgi
Published: 2023-08-25
Last modified: 2026-06-17

Description

Regular expression Denial-of-Service (ReDoS) exists in multiple add-ons for Mailform Pro CGI 4.3.1.3 and earlier, which allows a remote unauthenticated attacker to cause a denial-of-service condition. Affected add-ons are as follows: call/call.js, prefcodeadv/search.cgi, estimate/estimate.js, search/search.js, suggest/suggest.js, and coupon/coupon.js.

Frequently asked questions

What is CVE-2023-40599?: Regular expression Denial-of-Service (ReDoS) exists in multiple add-ons for Mailform Pro CGI 4.3.1.3 and earlier, which allows a remote unauthenticated attacker to cause a denial-of-service condition. Affected add-ons are as follows: call/call.js, prefcodeadv/search.cgi, estimate/estimate.js, search/search.js, suggest/suggest.js, and coupon/coupon.js.
How severe is CVE-2023-40599?: CVE-2023-40599 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-40599 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40599?: CVE-2023-40599 affects Synck Graphica Mailform Pro Cgi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40599?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-40599 published?: CVE-2023-40599 was published on 2023-08-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:synck_graphica:mailform_pro_cgi:*:*:*:*:*:*:*:*

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