THREATPORT/VULNERABILITY/CVE-2021-29622
MEDIUM SEVERITY

CVE-2021-29622

Prometheus vulnerability

CVSS
6.5
EPSS
19.6%
EPSS pct
97th
Exploited
No known
Prometheus is an open-source monitoring system and time series database. In 2.23.0, Prometheus changed its default UI to the New ui. To ensure a seamless transition, the URL's prefixed by /new redirect to /. Due to a bug in the code, it is possible for an attacker to craft an URL that can redirect to any other URL, in the /new endpoint. If a user visits a prometheus server with a specially crafted address, they can be redirected to an arbitrary URL. The issue was patched in the 2.26.1 and 2.27.1 releases. In 2.28.0, the /new endpoint will be removed completely. The workaround is to disable access to /new via a reverse proxy in front of Prometheus.
Affected vendor
Prometheus
Affected product
Prometheus
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness type (CWE)
Published
2021-05-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 19.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2021-29622

  • Confirm whether Prometheus Prometheus is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-29622.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-29622

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-29622 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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