CVE-2021-33256

highpriority · attend · 63EPSS 0.790 · 100 %ileEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

79.0% (100th) EPSS

CVSS 9.3 · high

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A CSV injection vulnerability on the login panel of ManageEngine ADSelfService Plus Version: 6.1 Build No: 6101 can be exploited by an unauthenticated user. The j_username parameter seems to be vulnerable and a reverse shell could be obtained if a privileged user exports "User Attempts Audit Report" as CSV file. Note: The vendor disputes this vulnerability, claiming "This is not a valid vulnerability in our ADSSP product. We don't see this as a security issue at our side.

cvss

Technical severity, 0–10. One row per scoring source.

9.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 10

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1236USprimary

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
zohocorp manageengine adselfservice plus= 6.1nvdUScpe:2.3:a:zohocorp:manageengine_adselfservice_plus:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-08-09modified 2026-06-17

related (326)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2018-11652US	critical9.8	23.6% (98th)	Exploit	2018-06-01
CSV Injection vulnerability in Nikto 2.1.6 and earlier allows remote attackers to inject arbitrary OS commands via the Server field in an HTTP response header, which is directly in…
CVE-2019-12765US	critical9.8	10.5% (96th)	Exploit	2019-06-11
An issue was discovered in Joomla! before 3.9.7. The CSV export of com_actionslogs is vulnerable to CSV injection.
CVE-2018-9035US	critical9.6	7.30% (94th)	Exploit	2018-04-04
CSV Injection vulnerability in ExportToCsvUtf8.php of the Contact Form 7 to Database Extension plugin 2.10.32 for WordPress allows remote attackers to inject spreadsheet formulas i…
CVE-2020-10131US	critical9.8	1.55% (75th)	Exploit	2023-09-06
SearchBlox before Version 9.2.1 is vulnerable to CSV macro injection in "Featured Results" parameter.
CVE-2019-13144US	critical9.8	1.84% (79th)	Exploit	2019-07-05
myTinyTodo 1.3.3 through 1.4.3 allows CSV Injection. This is fixed in 1.5.

+321 more

references (5)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan