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GHSA-jgh8-vchw-q3g7

MediumCVSS 5.3 / 10
Published Jan 27, 2023·Last modified May 4, 2026
Affected Components(0)

No affected components available

Description

Description

In SafeURL it is possible to specify a list of domains that should be matched before a request is sent out. The regex used to compare domains did not work as intended.

Impact

The regex used was:

re.match("(?i)^%s" % domain, value)

This has two problems, first that only the beginning and not the end of the string is anchored. Second, that a dot in the domain matches any character as part of regex syntax.

Therefore, an allowlist of ["victim.com"] could allow the domain "victimacomattacker.com" to be requested.

This has lower impact since the usual attacker aim in an SSRF is to request internal resources such as private IP addresses rather than an attacker's own domain. But, in a case where SafeURL had specifically been used to try to limit requests to a particular allowlist, say for example a PDF renderer, the finding would be more severe.

Patches

Fixed in https://github.com/IncludeSecurity/safeurl-python/pull/5

References

Server-side request forgery (SSRF)

Risk Scores
Base Score
5.3

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the integrity of the data.

Threat Intelligence
4.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2023-24622
    Alias
  • EUVD-2023-0298
    Alias

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Medium severity
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