CVE-2021-29676Network attack vector

Session hijacking via crafted URL link

Published Jun 25, 2021 · Updated Sep 17, 2024

Link injection in IBM Security Verify Privilege Vault before 10.9.66 allows remote authenticated users to hijack sessions through crafted URLs. IBM has not disclosed the affected URL parameter or the operation that allows attacker-controlled link content to influence responses. Exploitation requires low-privileged access and a victim to follow the link; reported consequences are cross-site scripting, cache poisoning, and session hijacking.

CVSS severity4.6
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link injection in IBM Security Verify Privilege Vault before 10.9.66 allows remote authenticated users to hijack sessions through crafted URLs. IBM has not disclosed the affected URL parameter or the operation that allows attacker-controlled link content to influence responses. Exploitation requires low-privileged access and a victim to follow the link; reported consequences are cross-site scripting, cache poisoning, and session hijacking.

The record

CVE
CVE-2021-29676
Published
Jun 25, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM Security Verify Privilege Vault
Classifications
CWE-74, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.9.66

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Security Verify Privilege Vaultversion=10.9.66

Published CVSS scores

4.0IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
4.6IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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