CVE-2021-21342

unknown

Published 2021-03-22 · Modified 2026-03-13

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CVSS v3

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CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS v4 NEW

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not yet in upstream

VIR risk

—

Description

A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host

Predictions

Exploit likelihood

30%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1.4.15-2`
sid	Fixed	`1.4.15-2`
forky	Fixed	`1.4.15-2`
bullseye	Fixed	`1.4.15-2`
bookworm	Fixed	`1.4.15-2`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Maven	com.thoughtworks.xstream:xstream	`<1.4.16`	`1.4.16`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.