CVE-2021-4274: A vulnerability, which was classified as problematic, has been found in sileht bird-lg

Routine

LOW 3.5MITIGATE

CVE-2021-4274 is a low-severity flaw (CVSS 3.5) affecting bird-lg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability, which was classified as problematic, has been found in sileht bird-lg. This issue affects some unknown processing of the file templates/layout.html. The manipulation of the argument request_args leads to cross site scripting. The attack may be initiated remotely. The name of the patch is ef6b32c527478fefe7a4436e10b96ee28ed5b308. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-707, CWE-79
Published	2022-12-21
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: bird-lg project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-21 19:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

bird-lg project bird-lg MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bird-lg || rpm -q bird-lg || bird-lg --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4274?

bird-lg: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-4274 being exploited?

CVE-2021-4274 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4274 affect?

CVE-2021-4274 affects bird-lg. Severity is low (CVSS 3.5). A vulnerability, which was classified as problematic, has been found in sileht bird-lg. This issue affects some unknown processing of the file templates/layout.html. The manipulation of the argument request_args leads to cross site scriptin

How urgent is CVE-2021-4274?

Priority 24/100. No elevated risk signals yet.

References

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