CVE-2021-22898

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• 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

4.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 90.4% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Low. 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

2021-06-11 15:49Z5 YR AGO

Last updated

2026-04-16 13:30Z4 MO AGO

Reserved

2021-01-06

Assigning CNA

hackerone

Record state

PUBLISHED

Severity

Low (CVSS 3.1)

CNA CVSS vector

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

Weaknesses

• CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
• CWE-909Missing Initialization of ResourceClass
• CWE-908Use of Uninitialized ResourceBase

Data version

5.2

Document digest

a22d69820f071593e3876736fb91c3fe62c401fa5bc8b2b027203dba4747d4df

• hackerone.comhttps://hackerone.com/reports/1176461x_refsource_MISC
• curl.sehttps://curl.se/docs/CVE-2021-22898.htmlx_refsource_MISC
• github.comhttps://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bdex_refsource_MISC
• lists.apache.org[guacamole-issues] 20210618 [jira] [Created] (GUACAMOLE-1368) Latest docker image fails security scans.https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3Emailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com//security-alerts/cpujul2021.htmlx_refsource_MISC
• www.openwall.com[oss-security] 20210721 [SECURITY ADVISORY] curl: TELNET stack contents disclosure againhttp://www.openwall.com/lists/oss-security/2021/07/21/4mailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-83fdddca0fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-5d21b90a30https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20210813 [SECURITY] [DLA 2734-1] curl security updatehttps://lists.debian.org/debian-lts-announce/2021/08/msg00017.htmlmailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfx_refsource_CONFIRM
• www.debian.orgDSA-5197https://www.debian.org/security/2022/dsa-5197vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20220828 [SECURITY] [DLA 3085-1] curl security updatehttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlmailing-listx_refsource_MLIST