CVE-2021-25988Public exploitNetwork attack vector

Administrator browser script execution via unsanitized sender names

Published Dec 29, 2021 · Updated Apr 30, 2025

Stored XSS in ifme 1.0.0 through 7.31.4 allows remote authenticated users to execute script in an administrator browser session. Notification helpers interpolate the stored sender name into generated HTML without sanitization; the patch adds sanitization and an email fallback. An attacker account must send an ally request, and an administrator must view the resulting notification; the script then receives the browser session's access.

CVSS severity5.4
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ifme 1.0.0 through 7.31.4 allows remote authenticated users to execute script in an administrator browser session. Notification helpers interpolate the stored sender name into generated HTML without sanitization; the patch adds sanitization and an email fallback. An attacker account must send an ally request, and an administrator must view the resulting notification; the script then receives the browser session's access.

The record

CVE
CVE-2021-25988
Published
Dec 29, 2021
Updated
Apr 30, 2025
Vendor
if-me
Product
ifme
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2025Record 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=1.0.0 <unspecified
  2. Affected versionversion=unspecified <=v7.31.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

if-me · ifmeversion=1.0.0 <unspecified; version=unspecified <=v7.31.4

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4MendCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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