CVE-2020-24904Public exploitNetwork attack vector

Local file disclosure via silent mailto attachment

Published Aug 11, 2023 · Updated Oct 9, 2024

Information disclosure in GNOME Gmail 2.5.4 allows remote attackers to read local files through a crafted mailto link. The attach parameter accepts an attacker-supplied local path and adds that file to a Gmail draft without warning; affected browser combinations also conceal the attachment. Exploitation requires the user to click the link and send the resulting message, which transmits the selected local file to the message recipient.

CVSS severity6.5
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

Information disclosure in GNOME Gmail 2.5.4 allows remote attackers to read local files through a crafted mailto link. The attach parameter accepts an attacker-supplied local path and adds that file to a Gmail draft without warning; affected browser combinations also conceal the attachment. Exploitation requires the user to click the link and send the resulting message, which transmits the selected local file to the message recipient.

The record

CVE
CVE-2020-24904
Published
Aug 11, 2023
Updated
Oct 9, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1204.001Malicious Link

Public exploit references

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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