CVE-2021-4249
CVE-2021-4249 is a medium-severity vulnerability in Haskell Xml-conduit with a CVSS 3.x base score of 4.3. 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-404.
Key facts
- Severity: Medium (CVSS 3.x base score 4.3)
- EPSS exploit prediction: 1% (52nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-404
- Affected product: Haskell Xml-conduit
- Published:
- Last modified:
Description
A vulnerability was found in xml-conduit. It has been classified as problematic. Affected is an unknown function of the file xml-conduit/src/Text/XML/Stream/Parse.hs of the component DOCTYPE Entity Expansion Handler. The manipulation leads to infinite loop. It is possible to launch the attack remotely. Upgrading to version 1.9.1.0 is able to address this issue. The name of the patch is 4be1021791dcdee8b164d239433a2043dc0939ea. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216204.
Frequently asked questions
- What is CVE-2021-4249?
- A vulnerability was found in xml-conduit. It has been classified as problematic. Affected is an unknown function of the file xml-conduit/src/Text/XML/Stream/Parse.hs of the component DOCTYPE Entity Expansion Handler. The manipulation leads to infinite loop. It is possible to launch the attack remotely. Upgrading to version 1.9.1.0 is able to address this issue. The name of the patch is 4be1021791dcdee8b164d239433a2043dc0939ea. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216204.
- How severe is CVE-2021-4249?
- CVE-2021-4249 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
- Is CVE-2021-4249 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-4249?
- CVE-2021-4249 affects Haskell Xml-conduit. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-4249?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-4249 published?
- CVE-2021-4249 was published on 2022-12-18 and last updated on 2026-06-17.
References
- https://github.com/snoyberg/xml/commit/4be1021791dcdee8b164d239433a2043dc0939ea
- https://github.com/snoyberg/xml/pull/161
- https://hackage.haskell.org/package/xml-conduit-1.9.1.0
- https://vuldb.com/?id.216204
Affected products (1)
- cpe:2.3:a:haskell:xml-conduit:*:*:*:*:*:*:*:*
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