CVE-2021-43137Public exploitNetwork attack vector

Account takeover via stored XSS and CSRF

Published Dec 1, 2021 · Updated Aug 4, 2024

Cross-site scripting and CSRF in PHPGurukul Hostel Management System 2.1 allow remote attackers to take over accounts through the profile update endpoint. The profile update endpoint stores the name field without output encoding and accepts cross-site requests without an anti-CSRF token, allowing attacker-controlled script execution in a victim session. Exploitation requires a logged-in victim to submit the crafted profile request and load the resulting page; successful chaining can steal session cookies and hijack the account.

CVSS severity8.8
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting and CSRF in PHPGurukul Hostel Management System 2.1 allow remote attackers to take over accounts through the profile update endpoint. The profile update endpoint stores the name field without output encoding and accepts cross-site requests without an anti-CSRF token, allowing attacker-controlled script execution in a victim session. Exploitation requires a logged-in victim to submit the crafted profile request and load the resulting page; successful chaining can steal session cookies and hijack the account.

The record

CVE
CVE-2021-43137
Published
Dec 1, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

8.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NISTAV:N/AC:M/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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