E-Sic Livre up to 0.2.2 Captcha restrito/inc/captcha.php l/a/tf/ql resource consumption

Summaryinfo

A vulnerability described as problematic has been identified in E-Sic Livre up to 0.2.2. This issue affects some unknown processing of the file restrito/inc/captcha.php of the component Captcha. Such manipulation of the argument l/a/tf/ql leads to resource consumption. This vulnerability is referenced as CVE-2026-50787. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in E-Sic Livre up to 0.2.2. Affected by this issue is an unknown code block of the file restrito/inc/captcha.php of the component Captcha. The manipulation of the argument l/a/tf/ql with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

e-SIC Livre (esiclivre) v0.2.2 and earlier contains an uncontrolled resource consumption vulnerability in restrito/inc/captcha.php. The application uses user-supplied parameters (l, a, tf, ql) without validation to generate CAPTCHA images, allowing remote attackers to cause denial of service via excessive memory and CPU consumption.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-50787 since 06/07/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

By approaching the search of inurl:restrito/inc/captcha.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

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• E-Sic Livre

Version

• 0.2.0
• 0.2.1
• 0.2.2

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CPE 2.2info

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