CVE-2024-23734Network attack vector

Encryption-key replacement via forged profile upload

Published Apr 10, 2024 · Updated Oct 31, 2024

Cross-site request forgery in savignano S/Notify for Bitbucket before 2.0.1 allows remote attackers to replace user encryption keys. The user-profile upload handler accepts state-changing S/MIME certificate or PGP key requests from a victim's authenticated browser without verifying that the request was intentionally initiated. Exploitation requires user-upload functionality to be enabled, a logged-in user to open a crafted link or site, and any replacement key to match that user's email address; affected users then cannot decrypt their notifications.

CVSS severity5.2
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in savignano S/Notify for Bitbucket before 2.0.1 allows remote attackers to replace user encryption keys. The user-profile upload handler accepts state-changing S/MIME certificate or PGP key requests from a victim's authenticated browser without verifying that the request was intentionally initiated. Exploitation requires user-upload functionality to be enabled, a logged-in user to open a crafted link or site, and any replacement key to match that user's email address; affected users then cannot decrypt their notifications.

The record

CVE
CVE-2024-23734
Published
Apr 10, 2024
Updated
Oct 31, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 31, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204.001User Execution: Malicious 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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