Connect with us

Hi, what are you looking for?



Flaw in SAP Firm’s XSS Filter Exposed Many Sites to Attacks

Roughly one hundred websites were exposed to cross-site scripting (XSS) attacks because an XSS filter used on some of their web pages could have been easily bypassed, a researcher reported on Sunday.

Roughly one hundred websites were exposed to cross-site scripting (XSS) attacks because an XSS filter used on some of their web pages could have been easily bypassed, a researcher reported on Sunday.

Ashar Javed, a security researcher who specializes in finding tricky XSS vulnerabilities, identified a reflected XSS flaw on a website used by Germany-based enterprise software maker SAP to list jobs available within the company.

While the affected page was protected by an XSS filter to prevent attacks, the expert discovered that developers had failed to escape certain strings, such as </ and , when sanitizing user input. This oversight could have allowed attackers to inject specially crafted XSS payloads into the website.

After conducting some tests, Javed discovered that </ could not be used for XSS attacks since the “</script> string was blocked, but the single quotation mark had been used by developers for “if” conditions, allowing the use of XSS payloads such as ‘-confirm(1)-’.

In this example, the JavaScript “confirm” function is used to display a dialog box containing the message “1” along with OK and Cancel buttons. However, the expert told SecurityWeek that other functions could have been used as well.

After reporting his findings to SAP at the software giant’s Product Security Expert Summit in March, Javed learned that the flawed XSS filter belongs to SuccessFactors, a SAP-owned company that provides cloud-based human capital management solutions.

The expert identified the buggy XSS filter on roughly 100 websites, many of which belong to high profile companies. Javed believes the filter is part of SuccessFactors’ product, which is also suggested by the fact that the vulnerable component is present on the jobs/careers domains of the impacted sites.

Advertisement. Scroll to continue reading.

The vulnerability was addressed roughly three months after it was reported to SAP. The company acknowledged the security researcher’s work in July.

Javed says he has also identified a series of flaws in SAP Enterprise Portal, which he plans on disclosing after they are resolved by the vendor.

Last month, the researcher reported finding an XSS vulnerability in YouTube Gaming, a gaming-focused video website launched this summer by YouTube. The expert reported his findings to Google and was awarded more than $3,000 for his work.

Related Reading: Serious Vulnerabilities Patched in SAP Products

Related Reading: SAP Updates Patch Twenty Vulnerabilities

Written By

Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

SecurityWeek’s Threat Detection and Incident Response Summit brings together security practitioners from around the world to share war stories on breaches, APT attacks and threat intelligence.


Securityweek’s CISO Forum will address issues and challenges that are top of mind for today’s security leaders and what the future looks like as chief defenders of the enterprise.


Expert Insights

Related Content


Less than a week after announcing that it would suspended service indefinitely due to a conflict with an (at the time) unnamed security researcher...

Data Breaches

OpenAI has confirmed a ChatGPT data breach on the same day a security firm reported seeing the use of a component affected by an...

Risk Management

The supply chain threat is directly linked to attack surface management, but the supply chain must be known and understood before it can be...


The latest Chrome update brings patches for eight vulnerabilities, including seven reported by external researchers.


Patch Tuesday: Microsoft warns vulnerability (CVE-2023-23397) could lead to exploitation before an email is viewed in the Preview Pane.


Apple has released updates for macOS, iOS and Safari and they all include a WebKit patch for a zero-day vulnerability tracked as CVE-2023-23529.

IoT Security

A group of seven security researchers have discovered numerous vulnerabilities in vehicles from 16 car makers, including bugs that allowed them to control car...

IoT Security

A vulnerability affecting Dahua cameras and video recorders can be exploited by threat actors to modify a device’s system time.