CVE-2021-28861

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

2.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 83.7% of scored records. A rank, not a probability.

NVD base score

7.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-08-23 00:00Z4 YR AGO

Last updated

2025-12-17 21:30Z8 MO AGO

Reserved

2021-03-19

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-601URL Redirection to Untrusted Site ('Open Redirect')Base

Data version

5.2

Document digest

98e3ae203cf41d72ef49b9128b4246f3e03178b7f569dfa5e95f8978f227fa75

• bugs.python.orghttps://bugs.python.org/issue43223
• github.comhttps://github.com/python/cpython/pull/93879
• github.comhttps://github.com/python/cpython/pull/24848
• lists.fedoraproject.orgFEDORA-2022-f511f8f58bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OKYE2DOI2X7WZXAWTQJZAXYIWM37HDCY/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-7fff0f2b0bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LTSPFIULY2GZJN3QYNFVM4JSU6H4D6J/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-a27e239f5ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7G66SRWUM36ENQ3X6LAIG7HAB27D4XJ/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-a2be4bd5d8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DISZAFSIQ7IAPAEQTC7G2Z5QUA2V2PSW/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-15f1aa7dc7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QLE5INSVJUZJGY5OJXV6JREXWD7UDHYN/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-fde69532dfhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPX4XHT2FGVQYLY2STT2MRVENILNZTTU/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-61d8e8d880https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X46T4EFTIBXZRYTGASBDEZGYJINH2OWV/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-4ac2e16969https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KRGKPYA5YHIXQAMRIXO5DSCX7D4UUW4Q/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-2173709172https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I3MQT5ZE3QH5PVDJMERTBOCILHK35CBE/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-01d5789c08https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2TRINJE3INWDVIHIABW4L2NP3RUSK7BJ/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-d1682fef04https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXF6MQ74HVIDDSR5AE2UDR24I6D4FEPC/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-79843dfb3chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IFGV7P2PYFBMK32OKHCAC2ZPJQV5AUDF/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-20116fb6aahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZEPOPUFC42KXXSLFPZ47ZZRGPOR7SQE/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-7ca361a226https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5OABQ5CMPQETJLFHROAXDIDXCMDTNVYG/vendor-advisory
• security.gentoo.orgGLSA-202305-02https://security.gentoo.org/glsa/202305-02vendor-advisory
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/12/msg00000.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/11/msg00024.html