The GetResponse Forms by Optin Cat plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.5.7. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
CVE-2024-8740
MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence
Score 6.1 from GitHub Security Advisory published 2024-10-18. NVD baseline CVSS 6.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EG Risk
- 28(Track)EG Risk 28/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity61% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 33%
- KEV
- Not listed
Published
October 18, 2024
Last Modified
April 8, 2026
References (3)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/getresponse/tags/2.4.1/includes/eoi-subscribers.php#L353
- security@wordfencehttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3198562%40getresponse%2Ftrunk&old=3057989%40getresponse%2Ftrunk&sfp_email=&sfph_mail=
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/51d14f45-4c30-4225-998d-f4f829e09bc0?source=cve
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Frequently asked(5)
What is CVE-2024-8740?
CVE-2024-8740 is a medium vulnerability published on October 18, 2024. The GetResponse Forms by Optin Cat plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of addqueryarg without appropriate escaping on the URL in all versions up to, and including, 2.5.7. This makes it possible for unauthenticated attackers to inject arbitrary web…
When was CVE-2024-8740 disclosed?
CVE-2024-8740 was first published in the National Vulnerability Database on October 18, 2024, with the most recent update on April 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-8740 actively exploited?
CVE-2024-8740 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.9% of all scored CVEs.
What is the CVSS score of CVE-2024-8740?
CVE-2024-8740 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2024-8740?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-8740, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
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